Mana Echoes [Double Masters] Vampire Ally Set: Mystery Booster Type: Instant

Set: Mystery Booster Type: Instant Rarity: Rare Cost: {3}{U}{U} You may exile a blue card from your hand rather than pay this spell's mana cost

Its students graduate the school and enter history

put that many +1/+1 counters on Tetravus

In this box

Mana Echoes [Double Masters] Vampire Ally Set: Mystery Booster Type: InstantSet: Double Masters Type: Enchantment Rarity: Mythic Cost: {2}{R}{R} Whenever a creature enters the battlefield, you may add an amount of {C} equal to the number of creatures you control that share a creature type with it. When the ground is saturated with mana, even the lightest footstep can bring it to the surface.