Is Convergence of Dominion legal in Standard, Modern, and Commander?

Convergence of Dominion is legal in: Legacy, Vintage, Commander.

What type of card is Convergence of Dominion?

Convergence of Dominion is an Artifact. Its oracle text reads: "Dynastic Command Node — As long as you control your commander, activated abilities of cards in your graveyard cost {2} less to activate. This effect can't reduce the mana in that ability's activation cost to less than one mana. Translocation Protocols — {3}, {T}: Mill three cards."

Convergence of Dominion

Artifact

$0.84 ↗2 combosCommander, Legacy

Dynastic Command Node — As long as you control your commander, activated abilities of cards in your graveyard cost less to activate. This effect can't reduce the mana in that ability's activation cost to less than one mana.