Is Cadric, Soul Kindler legal in Standard, Modern, and Commander?

Cadric, Soul Kindler is legal in: Legacy, Vintage, Commander.

Cadric, Soul Kindler

Q: What type of card is Cadric, Soul Kindler?

Cadric, Soul Kindler is a Legendary Creature — Dwarf Wizard. Its oracle text reads: "The "legend rule" doesn't apply to tokens you control. Whenever another nontoken legendary permanent you control enters, you may pay {1}. If you do, create a token that's a copy of it. That token gains haste. Sacrifice it at the beginning of the next end step."

Legendary Creature — Dwarf Wizard

The "legend rule" doesn't apply to tokens you control.

Whenever another nontoken legendary permanent you control enters, you may pay . If you do, create a token that's a copy of it. That token gains haste. Sacrifice it at the beginning of the next end step.