Is River Delta legal in Standard, Modern, and Commander?

River Delta is legal in: Legacy, Vintage, Commander.

What type of card is River Delta?

River Delta is a Land. Its oracle text reads: "River Delta doesn't untap during your untap step if it has a depletion counter on it.At the beginning of your upkeep, remove a depletion counter from River Delta.{T}: Add {U} or {B}. Put a depletion counter on River Delta."

River Delta

Land

River Delta doesn't untap during your untap step if it has a depletion counter on it.<br>At the beginning of your upkeep, remove a depletion counter from River Delta.<br>: Add or . Put a depletion counter on River Delta.