Ajani, Nacatl Pariah [Modern Horizons 3]

When Ajani, Nacatl Pariah enters the battlefield, create a 2/1 white Cat Warrior creature token.
Whenever one or more other Cats you control die, you may exile Ajani, then return him to the battlefield transformed under his owner's control.
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Ajani, Nacatl Avenger
[+2]: Put a +1/+1 counter on each Cat you control.
[0]: Create a 2/1 white Cat Warrior creature token. When you do, if you control a red permanent other than Ajani, Nacatl Avenger, he deals damage equal to the number of creatures you control to any target.
[-4]: Each opponent chooses an artifact, a creature, an enchantment, and a planeswalker from among the nonland permanents they control, then sacrifices the rest.