Time Dilation

Time Dilation is blue.
Suspend 4--{u}{u}{u}
Indestructible.
All permanents have suspend 1 in addition to
their casting cost.
All cards that aren't in play, spells, and
permanents have suspend 1 in addition to their
casting cost.
When Time Dilation leaves the battlefield,
suspend 2 instead.
What have we done?