Is Host of the Hereafter legal in Standard, Modern, and Commander?

Host of the Hereafter is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Host of the Hereafter

Q: What type of card is Host of the Hereafter?

Host of the Hereafter is a Creature — Zombie Warlock. Its oracle text reads: "This creature enters with two +1/+1 counters on it. Whenever this creature or another creature you control dies, if it had counters on it, put its counters on up to one target creature you control. *"I agreed to return and aid the Sultai. My friends here agreed to return and aid me."* Power/Toughness: 2/2"