Yaros, Lost in Chaos

Haste
Yaros, Lost in Chaos enters the battlefield with
3 Ki counters.
At the beginning of your main combat phase,
you may spend a Ki counter. If you do, Yaros,
Lost in Chaos gets +1/+1 and gains double strike
until end of turn.
At the beginning of your end step, if Yaros, Lost
in Chaos has no Ki counters, exile it.