Protean Canopy

Protean Canopy can't be played unless another
land named Protean Canopy entered the
battlefield under your control this turn.
{w}{u}{b}{r}{g}, Reveal this card from your hand:
Search your library for a card named Protean
Canopy, reveal it and put it onto the battlefield
tapped. Then shuffle your library.
{t}: For each land named Protean Canopy you control, add one mana of any color.