Is Merry Bards legal in Standard, Modern, and Commander?

Merry Bards is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Merry Bards

Q: What type of card is Merry Bards?

Merry Bards is a Creature — Human Bard. Its oracle text reads: "When this creature enters, you may pay {1}. When you do, create a Young Hero Role token attached to target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature has "Whenever this creature attacks, if its toughness is 3 or less, put a +1/+1 counter on it.")"

Creature — Human Bard

When this creature enters, you may pay . When you do, create a Young Hero Role token attached to target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature has "Whenever this creature attacks, if its toughness is 3 or less, put a +1/+1 counter on it.")