EDIT of Memoryhead's concept

Suspend 1 {u}{u}
Late Suspension 1 {u}{x} (When this creature dies,
you may pay {u}{x} and exile it with X time counters
on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without
paying its mana cost.)
When Memoryhead, The Eternally Late enters
the battlefield, take X extra turns where X is the
number of time counters it had in exile.