Maelstrom Portal

Search your library for a card with converted
mana cost equal to one plus the number of time counters on cards named Maelstrom Portal in
exile and cast it without paying its mana cost.
Then shuffle your library.
Reverberate 4 - {4}{g}{u}{r} ({4}{g}{u}{r}: Exile this
card from your hand with four time counters on it. At
the beginning of your upkeep, remove a time counter
from it. If you do, cast a copy of this card without
paying its mana cost. Activate only as a sorcery.)