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'Each player loses X life, discards X cards, sacrifices X creatures of their choice, then sacrifices X lands of their choice.
This land enters tapped unless you have two or more opponents.
{T}: Add {W} or {U}.
'{T}: Add {U}.
{1}: Return Oboro to its owner's hand.
'Each player loses X life, discards X cards, sacrifices X creatures of their choice, then sacrifices X lands of their choice.