Is Colossal Dreadmask legal in Standard, Modern, and Commander?

Colossal Dreadmask is legal in: Modern, Legacy, Vintage, Commander, Pauper, Historic.

Colossal Dreadmask

Q: What type of card is Colossal Dreadmask?

Colossal Dreadmask is an Artifact — Equipment. Its oracle text reads: "Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +6/+6 and has trample. Equip {3}{G}{G} *No legs to quake, no lungs to bellow, but if you see its teeth, it's still too late.*"