Celestial Battle Tiger
Large immortal beast (mount)

HP your bloodied value; Healing Surges none, but you can spend a healing surge for the tiger if an effect allows it to spend one
Defenses your defenses + 1, not including any temporary bonuses or penalties
Speed 9 (forest walk)

Tiger Agility (mount)

The tiger gains a +10 bonus to Acrobatics and Athletics checks. It does not need to move to gain a running start for Athletics (jump) checks.

Bite At-Will

Attack: Melee 1 (one creature); your level + 5 vs. AC

Hit: 2d8 + your Charisma modifier damage.

Battle Pounce Encounter

Effect: The tiger jumps up to 5 squares and attacks.

Attack: Melee 1 (one creature); your level + 5 vs. AC

Hit: 3d8 + your Charisma modifier damage, and the target falls prone.

Raking Claw At-Will

Trigger: An enemy enters a square adjacent to the tiger.

Attack (Immediate Reaction): Melee 1 (the triggering enemy); your level + 5 vs. AC

Hit: 1d8 + your Charisma modifier damage.

Published in Dragon Magazine 393.