Stev, a Skilled Bassist

Deathtouch
Stev cannot be a creature unless your devotion to red and green is five or more.
Keeping the Groove: As Stev enters the battlefield, roll three dice, one after another. Creatures you control get +X/+X where X is the dice roll for the respective turn. (Dice 1 applies to turn 1, etc.)
Slap the Bass: When this creature attacks, all creatures your opponents control must block it.
{r}{r}{g}{g}: Creatures you control gain first strike.
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