Is Marath, Will of the Wild legal in Standard, Modern, and Commander?

Marath, Will of the Wild is legal in: Legacy, Vintage, Commander.

What type of card is Marath, Will of the Wild?

Marath, Will of the Wild is a Legendary Creature — Elemental Beast. Its oracle text reads: "Marath enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it. {X}, Remove X +1/+1 counters from Marath: Choose one — • Put X +1/+1 counters on target creature. X can't be 0. • Marath deals X damage to any target. X can't be 0. • Create an X/X green Elemental creature token. X can't be 0."