"I'll fight two at once, and then lick their guts from my blades."

Modern Masters 2015

Viashino Slaughtermaster

Double strike (This creature deals both first-strike and regular combat damage.)
{B}{G}: Viashino Slaughtermaster gets +1/+1 until end of turn. Activate this ability only once each turn.

Double strike
{B}{G}: Viashino Slaughtermaster gets +1/+1 until end of turn. Activate only once each turn.

Conflux

Double strike
{B}{G}: Viashino Slaughtermaster gets +1/+1 until end of turn. Play this ability only once each turn.