Silurid Mutant

Whenever Silurid Mutant blocks or becomes blocked by a nonartifact creature, destroy that creature at end of combat.
Whenever one or more +1/+1 counters would be placed on Silurid Mutant, you may double the number of +1/+1 counters on it instead.

"Oops."
- Momir Vig, Simic Visionary