Guildpact Chamber

{t}: Add {c}.
{t}, Tap five untapped multicolored creatures you control: Add {w}{u}{b}{r}{g}. Spend this mana only
to cast multicolored spells.
"It is here that all the guilds came together, and here
Niv-Mizzet was reborn. It was like a tiny candle in
the midst of endless darkness, every guild coming together, setting aside their many differences to unite as
one."