the one card mtg Ring - Single The Gathering MtG One Ring card found,

Mogg War Marshal, Myr Battlesphere, and Seasoned Pyromancer all bring a creature or two (or four) with them

This ability not only allows for the casting of a costly and powerful spell for free, but it also prevents that spell from being countered by opponents going first

Voracious Hydra Having an immediate effect when entering the battlefield is a good way to be playable in Constructed, and Voracious Hydra has it

Set: Mirrodin Increase: +$16.73 Current Market Price: $17.17 Quicksilver Elemental can copy Vivis mana-generating ability for one mana and immediately refund the player with three mana, making it a sort of free mana battery once per turn

In situations where you do, theyre high-impact plays