Mana Echoes [Onslaught] Pro Tour Promos Set: Alpha Edition Type: Artifact

Set: Alpha Edition Type: Artifact Rarity: Rare Cost: {1} Creatures with power 3 or greater don't untap during their controllers' untap steps

except it's an enchantment in addition to its other types

waiting for a victory only it can see

Whenever a player casts a spell with mana value equal to the number of charge counters on Chalice of the Void

−2: Gain control of target artifact

Mana Echoes [Onslaught] Pro Tour Promos Set: Alpha Edition Type: ArtifactSet: Onslaught Type: Enchantment Rarity: Rare 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.