Protection from white and red saves a creature from some of the best removal colors in Magic
I understand it it would go infinite with Kari Zev, Skyship Raider and any sac outlet, among others but come on, Wizards , how many times in a row is a player going to realistically be able to sacrifice attacking legendary creatures
That ability gets out of control fast in decks that fill the graveyard naturally
Blasphemous ActBlasphemous Act The average deck already has FarewellFarewell, DamnDamn, Ruinous UltimatumRuinous Ultimatum, and VandalblastVandalblast
Lowering a creature's power Blue is the color that gets N/-0 effects, what R&D nicknames "shrinking." This can be done on an instant, often affecting more than one creature until end of turn
It takes very little to turn two counters and two spells cast for into a significant advantage