Is Legion Warboss legal in Standard, Modern, and Commander?

Legion Warboss is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Legion Warboss

Q: What type of card is Legion Warboss?

Legion Warboss is a Creature — Goblin Soldier. Its oracle text reads: "Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) At the beginning of combat on your turn, create a 1/1 red Goblin creature token. That token gains haste until end of turn and attacks this combat if able. Power/Toughness: 2/2"

Creature — Goblin Soldier

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

At the beginning of combat on your turn, create a 1/1 red Goblin creature token. That token gains haste until end of turn and attacks this combat if able.

Power/Toughness: 2/2

Set Tarkir: Dragonstorm Commander

Rarity Rare

Mana Value 3

Artist Alex Konstad

Collector # 220

Scryfall