Swordburst Arcanist

Dethrone (Whenever this creature attacks a player with the most life or tied for the most life, put a +1/+1 counter on it).
{1}{w}{g/w}: Swordburst Arcanist gains first strike and vigilance until end of turn.
"I would have no problem with the Jarlaxle Empire and the Arcane Brotherhood... but they think my favorite spell is the 'proven worst' in the world!"