Is Akoum Stonewaker legal in Standard, Modern, and Commander?

Akoum Stonewaker is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

What type of card is Akoum Stonewaker?

Akoum Stonewaker is a Creature — Human Shaman. Its oracle text reads: "Landfall — Whenever a land you control enters, you may pay {2}{R}. If you do, create a 3/1 red Elemental creature token with trample and haste. Exile that token at the beginning of the next end step. Power/Toughness: 2/1"

Akoum Stonewaker

Creature — Human Shaman

Landfall — Whenever a land you control enters, you may pay . If you do, create a 3/1 red Elemental creature token with trample and haste. Exile that token at the beginning of the next end step.