Cak, the Young Monk

Cak, the Young Monk enters the battlefield with 2 {e} counters on it. At the beginning of your end
step, put an {e} counter on Cak.
Remove 1 {e}: Cak cannot be blocked until end of
turn.
Remove 1 {e}: Cak gains double strike until end of
turn.
Remove 2 {e}: Cak gets +1/+0 for each other
creature you control until end of turn.