The Old Dragonslayer

First strike, vigilance
{2}{w},{t}: The Old Dragonslayer gets +2/+1, and
gains Double strike until end of turn.
{2}{b},{t}: Deal 3 damage to any target.
{4}{w}{b},{t}: The Old Dragonslayer gets +4/+4,
and gains trample, and double strike until end of
turn, then deals 10 damage combined to any
number of targets, until end of turn if target
creature an opponent controls died this turn,
return it to the battlefield under your
control.