Auntie Ool, Cursewretch + Morselhoarder + Words of War + Everlasting Torment
Auntie Ool, Cursewretch
Morselhoarder
Words of War
Everlasting Torment
Infinite colored mana
How it works
Activate Words of War by paying 1.
Attempt to draw a card. The draw will be replaced by Words of War targeting Morselhoarder. The 2 damage will instead place two -1/-1 counters on Morselhoarder due to Everlasting Torment.
Auntie Ool triggers. Holding priority, activate Morselhoarder twice by removing two -1/-1 counters from it, adding two mana of any color.
Activate Words of War by paying 1.
Resolve the Auntie Ool trigger, attempting to draw a card. The draw will be replaced by Words of War targeting Morselhoarder. The 2 damage will instead place two -1/-1 counters on Morselhoarder due to Everlasting Torment.