Trample

Clockwork Giant enters the battlefield with three +1/+1 counters on it.

At the beginning of your upkeep, remove a +1/+1 counter from Clockwork Giant. If you do, create a 1/1 colorless Thopter artifact creature token with flying.

Whenever Clockwork Giant deals combat damage to a player, put a +1/+1 counter on it for each damage dealt.