Demon from Below

At the beginning of your upkeep, put X 2/2 blue
Hydra tokens onto the battlefield, where X is the number of +1/+1 counters on Demon from
Below.
Whenever a creature you control attacks, put a
+1/+1 counter on Demon from Below.
Whenever a Hydra you control dies, choose one:
• Your opponent puts the top two cards of his
library into his graveyard.
• Your opponent discards a card.