Dee Jay, Rhythm Of Battle

Whenever you cast a spell, if it's not the first
spell you've cast this turn, target creature you
control seeks glory.
Gloryseeking creatures you control have haste
and get +1/+0 as long as you've cast two or more
spells this turn. They get +1/+0 as long as you've
cast three or more spells this turn. They have
double strike as long as you've cast four or more
spells this turn.