Massacre Wurm (Extended) [Core Set 2021]

Set: Core Set 2021 Type: Creature — Phyrexian Wurm Rarity: Mythic Cost: {3}{B}{B}{B} Clockwork Beast enters the battlefield with seven +1/+0 counters on it.At end of combat, if Clockwork Beast attacked or blocked this combat, remove a +1/+0 counter from it.{X}, {T}: Put up to X +1/+0 counters on Clockwork Beast. This ability can't cause the total number of +1/+0 counters on Clockwork Beast to be greater than seven. Activate only during your upkeep.