Ekko, Who Shattered Time

At the beginning of your end step, put a Z-Drive counter on Ekko.

Remove a Z-Drive counter: Ekko deals 1 damage to target creature and taps it. Put a stun counter on it. OR Ekko gains hexproof until end of turn.

Remove 4 Z-Drive counters from Ekko: Untap all permanents that were tapped this turn. Put a hexproof counter on Ekko. Take an additional combat phase this turn, but only Ekko may attack during this phase. Ekko gains +3 +3 and Double Strike during this phase.