Is Custodi Soulbinders legal in Standard, Modern, and Commander?

Custodi Soulbinders is legal in: Legacy, Vintage, Commander.

Custodi Soulbinders

Q: What type of card is Custodi Soulbinders?

Custodi Soulbinders is a Creature — Human Cleric. Its oracle text reads: "This creature enters with X +1/+1 counters on it, where X is the number of other creatures on the battlefield. {2}{W}, Remove a +1/+1 counter from this creature: Create a 1/1 white Spirit creature token with flying."