Is Termination Facilitator legal in Standard, Modern, and Commander?

Termination Facilitator is legal in: Legacy, Vintage, Commander.

Termination Facilitator

Q: What type of card is Termination Facilitator?

Termination Facilitator is a Creature — Human Assassin. Its oracle text reads: "{T}: Put a bounty counter on target creature or planeswalker. Activate only as a sorcery. Whenever a creature or planeswalker an opponent controls with a bounty counter on it is dealt damage, destroy it."