It's great removal for Limited that leaves you with a 3/2 that fuels other party effects. It's about what you'd expect to see for a -X/-X effect at common, and it'll reliably be giving out -3/-3 which takes out a significant number of creatures in this Limited environment. It's a slightly less tough Silumgar Butcher for 1 more but you don't need to sacrifice a creature (though you will still need to have other creatures on the board).
For when you need both removal and another party member. I really like the short but sweet flavor text.
Source: Limited Resources
Archatmos
Excellion
Fracture: Israfiel (WBR), Wujal (URG), Valedon (GUB), Amduat (BGW), Paladris (RWU)
Collision (Set Two of the Fracture Block)
Quest for the Forsaken (Set Two of the Excellion Block)
Katingal: Plane of Chains