Is Jiang Yanggu legal in Standard, Modern, and Commander?

Jiang Yanggu is legal in: Legacy, Vintage, Commander.

Jiang Yanggu

Q: What type of card is Jiang Yanggu?

Jiang Yanggu is a Legendary Planeswalker — Yanggu. Its oracle text reads: "+1: Target creature gets +2/+2 until end of turn. −1: If you don't control a creature named Mowu, create Mowu, a legendary 3/3 green Dog creature token. −5: Until end of turn, target creature gains trample and gets +X/+X, where X is the number of lands you control."