Fickle Mob

Haste
Fickle Mob attacks each turn if able.
Whenever Fickle Mob attacks, flip a coin. If you win the flip, put a +1/+1 counter on Fickle Mob. If you lose the flip, remove Fickle Mob from combat and defending player gains control of it.
A cause so dubious it might not last the
length of the battlefield.