Tahdikei, the Merciless

X: Deal X damage to target creature you don't control equal to the number of equipment you cast this turn. Then discard a card.
-3: Deal 4 damage to target opponent. That opponent may sacrifice a creature to negate this effect. If they do, each player draws a card.
-9: Each opponent sacrifices a land and a nonartifact spell. If an opponent controls an Forest or Plains, they discard their hand instead.