Fervent Onslaught

Ordain (When you cast this spell you may tap a
creature you control that shares a color with it. If
you do, this spell becomes ordained.)
Attacking white creatures get +2/+1 until end of
turn. If this spell was ordained, those creatures
also gain vigilance until end of turn.
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"The time for wise words is over. Only our blades will
convince them." - Zahira, Resplendant Avenger