Slag, Anvil of the Forged

When Slag, Anvil of the Forged enters the battlefield, put a burn counter on each creature your opponent controls.
Scorch (Whenever this creature deals damage to a creature, put a burn counter on that creature. Creatures with burn counters on them take double the damage and can't attack.)
{r}{r}{r}: Deal 1 damage to all creatures your opponent controls.