mtg errata cards Magic The Gathering - Erratic Explosion - Onslaught Huge MTG Errata Threatens to

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You can play explore cards that let you hit your land drops more efficiently, it helps to play 3+ colors or expensive spells, it sets your graveyard for shenanigans, and much more

"Commander format"

Since the given creature attacks the controller, they count as the defending player for, say, annihilator

usually because despite being fun designs and interesting breaks, they would start to drift off-archetype by being out of color and thus feel out of place in the set