If you have Nissa and your opponent has a single non-flying, non-trampling creature, its going to need help to get through and actually damage her
Story comes first in the game, which often resembles more of a card-driven roleplaying game than a typical LCG
It all started with Rainbow Dragon in Tactical Evolution, the first ghost rare card printed in the TCG
It just asks for three mana and a target worth stealing, and it even leaves Dack sitting on one loyalty for future turns
It looks funny at first, but just imagine trying to calculate the power of your creatures after the effects of a Mirror EntityMirror Entity, Agony WarpAgony Warp, Overwhelming StampedeOverwhelming Stampede, and a MutilateMutilate
But they've cost a lot more mana