Texto em português

Toda vez que você conjurar uma mágica vermelha, se Vapóreo em Fuga tiver menos de três marcadores +1/+1, coloque um marcador +1/+1 em Vapóreo em Fuga.

Remova três marcadores +1/+1 de Vapóreo em Fuga: Adicione {R} {R} {R} .

Rulings

Runaway Steam-Kin has to be on the battlefield for its ability to trigger. Casting it won’t trigger its own ability.2018-10-05
Runaway Steam-Kin’s triggered ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.2018-10-05
If Runaway Steam-Kin has three or more +1/+1 counters on it after you’re done paying for a red spell, its ability doesn’t trigger at all. If it has three or more +1/+1 counters on it as its triggered ability resolves, it doesn’t get a +1/+1 counter.2018-10-05