Is Relic Seeker legal in Standard, Modern, and Commander?

Relic Seeker is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Relic Seeker

Q: What type of card is Relic Seeker?

Relic Seeker is a Creature — Human Soldier. Its oracle text reads: "Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.) When this creature becomes renowned, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle. Power/Toughness: 2/2"