Ravenous Leucrocota

You have hexproof. (You can't be the target of spells or abilities your opponents control.)

2W, Sacrifice this enchantment: You gain 7 life.

Counter target spell. Its controller mills four cards.

Constellation — Whenever this creature or another enchantment you control enters, you gain 1 life. WB, Pay 1 life: Each opponent loses 1 life.

Whenever this creature attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Squelching Leeches's power and toughness are each equal to the number of Swamps you control.

Constellation — Whenever this creature or another enchantment you control enters, this creature deals 1 damage to any target.