Is Clay Golem legal in Standard, Modern, and Commander?

Clay Golem is legal in: Legacy, Vintage, Commander.

Clay Golem

Q: What type of card is Clay Golem?

Clay Golem is an Artifact Creature — Golem. Its oracle text reads: "{6}, Roll a d8: Monstrosity X, where X is the result. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.) Berserk — When this creature becomes monstrous, destroy target permanent."