Is Triskelavus legal in Standard, Modern, and Commander?

Triskelavus is legal in: Modern, Legacy, Vintage, Commander.

Triskelavus

Q: What type of card is Triskelavus?

Triskelavus is an Artifact Creature — Construct. Its oracle text reads: "Flying This creature enters with three +1/+1 counters on it. {1}, Remove a +1/+1 counter from this creature: Create a 1/1 colorless Triskelavite artifact creature token with flying. It has "Sacrifice this token: This token deals 1 damage to any target.""

Artifact Creature — Construct

Flying

This creature enters with three +1/+1 counters on it.

, Remove a +1/+1 counter from this creature: Create a 1/1 colorless Triskelavite artifact creature token with flying. It has "Sacrifice this token: This token deals 1 damage to any target."