Active Rift Elemental by paying {1}{R} and removing a time counter from Rousing Refrain.
Repeat until Rousing Refrain has no time counters on it.
Rousing Refrain triggers, causing you to cast it without paying its mana cost.
Resolve Rousing Refrain, adding at least seven {R} and exiling Rousing Refrain with three time counters on it.
Resolve all Rift Elemental abilities from step 1, giving Rift Elemental +2/+0 for each ability resolved.
Repeat.

Infinitely powerful creature until end of turn

Infinite magecraft triggers

Infinite red mana

Infinite storm count

Rousing Refrain

Rift Elemental

Cast Time Warp by paying its mana cost, causing you to take an extra turn after this one.
Declare any creature as an attacker. When you do, Doom's Time Platform triggers, exiling Time Warp from your graveyard with two time counters on it.
Move to your next turn. At the beginning of your upkeep, Time Warp's suspend ability triggers, removing a time counter from it.
Activate Rift Elemental by paying {1}{R} and removing a time counter from Time Warp.
Time Warp's suspend ability triggers, causing you to cast it without paying its mana cost.
Resolve Time Warp, causing you to take an extra turn after this one.
Repeat from step 2.

Infinite turns

Lock

Doom's Time Platform

Time Warp

Activate Phyrexian Altar by sacrificing Rift Elemental, adding {R}.
Rift Elemental dies, triggering Titania's second ability, causing you to mill three cards.
Cast Rift Elemental from your graveyard for its escape cost by paying {R} and exiling three other cards from your graveyard.
Repeat.

Combos with "Rift Elemental"