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Activate this ability only during the declare attackers step and only if you've been attacked this step
Set: Commander 2015 Type: Creature — Vampire Uncommon Cost: {4}{B}{B} Flying As Thief of Blood enters the battlefield
Set: Dominaria Type: Legendary Artifact Mythic Cost: {0} {T}: Add one mana of any color among legendary creatures and planeswalkers you control
and even houses
Some myr monitor other myr
Herald of Secret Streams [Ixalan Promos] Core Set 2019 Activate this ability only duringSet: Ixalan Promos Type: Creature Merfolk Warrior Rare Cost: {3}{U} Creatures you control with +1 +1 counters on them can't be blocked. "You might as well try to stop the waterfall."