Foreshorten

Convoke (Your creatures can help cast this spell.
Each creature you tap while casting this spell pays for
{1} or one mana of that creature's color.)
All tapped creatures phase out. (While they're
phased out, they're treated as though they don't exist.
Each one phases in before its controller untaps during
their next untap step.)
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Times are most desperate in the fading mind.