Tentacle Swarm

Tentacle Swarm deals X damage to target creature. If that creature dies this turn, put a +1/+1 counter onto up to X target Silver creatures.
"No guard could stop the silver's raid on our vault; so don't even try to blame my men and women, as their wills are as strong as any soldier of the imperial army, possible stronger!"
- Aeni, Captain of the City Guard