CR 100? - Xizil

A strange inquiry. It's actually pretty difficult to pin CR 100 down exactly. I have a lot of creatures which peak at about 35, and most species of dragons can hit about 60 in their prime. I do have young rampagers, which are a CR 80, but when they grow up, they hit 266.

Why, I'd have to make one. Probably some form of boss.​

Xizil
Unique Planar Chaos Born Humanoid - CR = 100 (Counts as 300 for Summoning Spells) Size: Giant (30' x 30')
Xizil is a Greater Zixilite Daemon who guards the entrance to the labrynthian "Vault of the Ancient Ones." His sole purpose is to beat anyone into the ground if they try to enter the vault, as only those with ancient one blood are allowed to enter.
He towers over most opponents, and his appearance is hard to describe as anything but a terror which has leapt out of a nightmare. With lava for saliva, and daemonic horns that curl down around the length of his form, and his burning black soul-less eyes, Xizil poses not only a threat physically, but mentally.

HP: 100,000 WP: 50,000
MP: 25,000 SP: 12,500
Init: +40, 2 Phase Hit: +260
Dodge: +45 (Size) Block: +340
Def: 500/1500 (2000) M.Def: 74/222 (296)

Avatar's Hammer: Xizil constructs a massive hammer from the plates of his body and uses it as his primary form of enemy-crushing damage. A single attack from this hammer deals 1d10*100+300(Strength) Crushing Damage. With a full turn of chained attacks using no skills or other abilities, his hammer can deal 31d10*100+300 Crushing Damage.
Voracious Bite: Succeeding at a grapple, Xizil can sink his 200 sharp teeth into his target, dealing 1d12*200+600(Double Strength) Vampiric Damage, and holding them in the grapple still. Each time this succeeds, the target has training progress in both Strength and Endurance reduced by the amount of damage taken.
Hemorrhaging Strike: Xizil forms a bearded axe from his plates and attacks the target's vital organs. This skill costs him 2000 WP, but this attack will cause the target to begin taking Diminishing Bleeding Damage over time. The initial damage dealt is 1d6*150+300(Strength)+1200 Breaching 240 Damage. This reduces Xizil's amount of total attacks by one (out of 31) when used.
Marked for Murder: Xizil flings a series of darts from his plates and at the cost of 500 WP, sending them hurtling it at an opponant that is up to 240' away (before range penalties are involved.) Should they hit, it deals 1d12*100+500 Damage. This skill takes up one from his total attacks when used. If he damages the target in melee by the end of the next round, he will magically tear the darts back, and deal a bonus of 750, which adds on to his melee attack damage and deals whatever form of damage that is.
Dark Vortex: Xizil turns his plates into a long glaive and for the cost of 500 WP, he swirls it around him, attacking anyone that is within Extended Melee from (1) to (5), and pulling them up to 15' closer to him. This attack deals 1d12*200+300(Strength) Breaching 240 Damage. This attack takes up 5 of Xizil's total attacks in a turn.
Earthquake Punch: Xizil's fists harden, and at the cost of 880 WP, he slams down onto his target, dealing 1d4*100+300(Strength) Damage. This attack deals 50% of its total damage to every enemy within 120' of the afflicted target unless they pass a Moving Dodge CR of 160 or an Endurance CR of 275. This attack takes up 4 of Xizil's total attacks in a turn.
Blocking: Xizil can form a large sheild with one arm, giving him his ability to block attacks. This shield has 4000 AP. If destroyed, Xizil cannot create it until after the end of the following round.
Parry: When attacked in melee, he can spend 200 WP to create a sickle-blade to parry an attack by using his perception. If he succeeds, he can immediately use the skill Counter for free.
Counter: When attacked in melee, he can spend 50 WP to attack back. This attack is a single swing using his hammer. This attack has +50 extra to hit the target, and deals 1d10*100+300(Strength) Crushing Damage. Xizil can do this up to 12 times in a round.
Lava Breath: Shooting forth molten lava from his mouth, Xizil is able to cover up to five 5' tiles with this attack. Anyone in the tile when the attack is made, and anyone who enters the tile, or is standing in the tile when the turn starts, takes 1d100*100 points of Elemental Fire Damage. This attack is a perception based attack initially. This skill takes up 10 of Xizil's total attacks in a turn.
Quick Casting: Xizil can take both his full attacks (31) and his full casting actions (4) in a turn as long as he spends 50% extra on his spells.
Warmage: Xizil can cast spells up to level 27. However, he limits himself to level 17 spells, since he automatically succeeds at them. Xizil employs Level 12 Hyper Burst with sincere pleasure. He will also try to flash heal beaten opponents enough that they stay unconcious, so that he may Devour their Soul without concern.
Fire Affinity: Xizil casts fire spells as a Fire Mage, Pyromancer, Pyromaster, Lord of Flame, and has an additional +50% damage on fire spells from being a Zixlite. In total, this makes his spells cost half, deal physical elemental damage, have twice the dice rolls, have twice the end bonus, and on top of that, gain a +50% to the total damage dealt.
Gaze of Dread: On a successful Gaze attack, Xizil can spend 200 MP to cause Fear in any target that does not beat a Willpower RC 220. This counts as a spell cast action for Xizil.
Vision of Chaos: For the cost of 800 MP, Xizil afflicts everyone in the surrounding 200' with visions of Vir'Zixl, the Chaos Deity. Anyone who does not succeed against a Willpower RC 200 will end up in the Chaos condition and begin to attack anything near them. This counts as a spell cast action.
Devour Soul: At the cost of 100 SP, Xizil deals 1d100*10 Neutral Magical SP Damage to a target. Any damage dealt restores Xizil's SP. This is often used on a target after they are knocked unconcious so that he may add their soul to his collection. This counts as a spell cast action.

Half-Undead: As a product of their Chaos Deity Vir'Zixl, greater zixlites don't take any damage from bleeding, and can re-grow from any damage, including loss of limbs. Called shots and crits still deal their bonus damage, but they only take 50% of the damage from any weapon with the normal damage type.
Divine Protection: Xizil is unaffected by any status effect that requires a Willpower RC.
Multi-Vision: Xizil has Ultravision, Truesight, and Infra-Vision.
True Grip: Since he has such huge hands with 7 fingers on each one, he has +140 to his grappling attempts.
Healing: Xizil regains HP at the beginning of each turn equal to his current Endurance. Without any modifiers, this gives him 500 HP each turn.
Armored Body: Xizil's daemonic flesh and armored plates gives him Defense and Magic Defense equal to triple his Endurance and his Willpower.

Modes: Xizil can at any time enter one of these modes as a whole-turn action. Only one mode can be held at a time.
Embodiment of Fire: Xizil's daemonic eye opens in his abdomen and engulphs him in flames. To enter this mode, Xizil must concentrate for one turn. While Embodied in Flames, Xizil has doubled Melee Damage, doubled Speed, and has all Damage converted to Elemental Fire.
Embodiment of Lightning: Xizil's daemonic eye opens and envelopes him in electricity. While Embodied in Lightning, Xizil's Speed Triples and All Damage is Converted to Elemental Lightning.
Embodiment of Death: Xizil's daemonic eye turns dark purple, and he becomes engulphed in the black fires of death. While Embodied with Death, Xizil's Strength Doubles, but his HP and Endurance are halved. However, he has a 60% Assassination Chance, and all Physical Damage becomes Vampiric while all Fire Damage becomes Death.
Embodiment of Life: Xizil's daemonic eye opens and begins to glow, while his body begins to expel small pink sparkling lights. While Embodied with Life, Xizil's Max HP and Endurance are doubled, and his HP Regen Rate becomes double his Endurance. This mode also grants him immunity to poisons, venoms, and diseases, and cures him of all such effects when he transforms into it.

Base Stats:
Str: 300 End: 500
Mag: 220 Will: 74
Spd: 180 Sth: 20
Per: 260 Kno: 46

He's a bit of a head-kicker. Okay, more than a bit, but the Vault of the Ancients has great rewards.​