The Tax Cat

Snuggles 2 (When this creature enters the battlefield,
players must tap two permanents)
Whenever an opponent casts a spell, you create a
0/1 Dead Mouse token with: At the beginning of
your upkeep, this creature deals one damage to you.
{2}: Target opponent gains control of target
permanent you control.

"Who's a cute kitten? YOU'RE a cute kitten! "