Doom's Time Platform + Shivan Sand-Mage + Temporal Manipulation + Elrond, Moon-Reader

Doom's Time Platform

Shivan Sand-Mage

Temporal Manipulation

Elrond, Moon-Reader

How it works

1. Declare any creature as an attacker. When you do, Doom's Time Platform triggers, exiling Temporal Manipulation from your graveyard with two time counters on it.
2. Blink Shivan Sand-Mage using Elrond.
3. When Shivan Sand-Mage enters, it triggers, removing two time counters from Temporal Manipulation.
4. Temporal Manipulation's suspend ability triggers, causing you to cast it without paying its mana cost.
5. Resolve Temporal Manipulation, causing you to take an extra turn after this one.
6. Repeat each turn.