River Song

1, T: Add GW.

T: Add C. 2, T: This land becomes a copy of target land, except it has this ability.

This land enters tapped. T: Add G, U, or R.

T: Add one mana of any color in your commander's color identity.

T: Add C. Basic landcycling 1 (1, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

(T: Add B.)

T: Add C. T: Add B or R. This artifact deals 1 damage to you.

This land enters tapped. T: Add U, R, or W.