Is Ogre-Head Helm legal in Standard, Modern, and Commander?

Ogre-Head Helm is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Ogre-Head Helm

Q: What type of card is Ogre-Head Helm?

Ogre-Head Helm is an Artifact Creature — Equipment Ogre. Its oracle text reads: "Equipped creature gets +2/+2. Whenever this creature or equipped creature deals combat damage to a player, you may sacrifice it. If you do, discard your hand, then draw three cards. Reconfigure {3} ({3}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)"

Artifact Creature — Equipment Ogre

Equipped creature gets +2/+2.

Whenever this creature or equipped creature deals combat damage to a player, you may sacrifice it. If you do, discard your hand, then draw three cards.

Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)