Gloomfang Mauler

幽牙虐杀兽 (Gloomfang Mauler) (zhs)

Creature - Nightmare | Power/Toughness: 5 / 5 (CMC 7)
Swampcycling (, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)
Backup 2 (When this creature enters the battlefield, put two +1/+1 counters on target creature. If that's another creature, it gains the following ability until end of turn.)