Paradox Engine, and Stonecloaker

Prerequisites

• Paradox Engine on the battlefield
• Stonecloaker in hand
• Non land mana sources that produce 3+ mana (one of which has to be white)

Steps

1. Cast Stonecloaker
2. Paradox engine triggers untapping all our non-lands
3. On resolution, Stonecloaker's ETB effects trigger, to preserve your own graveyard stack them as bounce, then exile, but to just exile all yards, order doesn't matter
4. Tap all non-land mana sources for mana
5. Responding to the exile trigger by casting Stonecloaker again allows you to repeat this process ad nauseum while only selecting a finite number of targets before letting the exile effects resolve

Results

• Infinite ETB
• Infinite untap all non-lands at instant speed
• Possibly infinite mana (requires nan land mana sources of 4+ mana)
• Unlimited targeted graveyard hate
• Exile all cards from all graveyards