Is Mausoleum Wanderer legal in Standard, Modern, and Commander?

Mausoleum Wanderer is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Mausoleum Wanderer

Q: What type of card is Mausoleum Wanderer?

Mausoleum Wanderer is a Creature — Spirit. Its oracle text reads: "Flying Whenever another Spirit you control enters, this creature gets +1/+1 until end of turn. Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays {X}, where X is this creature's power. Power/Toughness: 1/1"