Zydra, Herald of Madness

Menace
At the beginning of your upkeep, each player
gets an insanity counter.
At the beginning of each player's end step, if
they have 7 or more insanity counters, they choose
one -
•Discard two cards at random
•Sacrifice a nonland permanent
•Zydra, Herald of Madness deals 3 damage to them.