Witherscale Wurm [Shadowmoor] Legends Set: Battle for Zendikar Type:

Set: Battle for Zendikar Type: Creature — Human Soldier Ally Rarity: Uncommon Cost: {3}{R}{W} Rally — Whenever Resolute Blademaster or another Ally enters the battlefield under your control

Set: Fossil Unlimited Type: Psychic Rarity: Rare Retreat cost: Colorless

It's a shrew

the test subject decided to perform trials on the scientists

Witherscale Wurm [Shadowmoor] Legends Set: Battle for Zendikar Type:Set: Shadowmoor Type: Creature Wurm Rarity: Rare Cost: {4}{G}{G} Whenever Witherscale Wurm blocks or becomes blocked by a creature, that creature gains wither until end of turn. (It deals damage to creatures in the form of 1 1 counters.) Whenever Witherscale Wurm deals damage to an opponent, remove all 1 1 counters from it.