Shandere, Heir of Chaos

+1: Until your next turn, whenever a player casts an instant or sorcery spell, each other player may copy it and may choose new targets for the copy.
-X: As an additional cost to activate this ability, sacrifice X lands. Until your next turn, instant and sorcery spells cost X less to cast.
-7: Each player draws seven cards, then loses life equal to the number of cards in their hand minus the number of land cards in their graveyard.