The List

Creature — Elemental

Devour 1 (As this creature enters, you may sacrifice any number of creatures. It enters with that many +1/+1 counters on it.)
When this creature enters, draw a card for each creature it devoured.

Skullmulcher

Modern Masters 2015

Creature — Crocodile

Shroud (This creature can't be the target of spells or abilities.)
Whenever another creature dies, you may put a +1/+1 counter on this creature.

Algae Gharial

Shards of Alara

Creature — Goblin Scout

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)