Pashalik Mons + Mana Echoes + Agatha's Soul Cauldron
Pashalik Mons
Mana Echoes
Agatha's Soul Cauldron
Infinite colored manaInfinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite colorless manaInfinite damageInfinite creature tokensInfinite colored mana that can only be spent to activate abilities of creatures
How it works
Activate Pashalik Mons by paying 4 and sacrificing a Goblin.
The Goblin dies, triggering Pashalik Mons, dealing 1 damage to any target.
Resolve the Pashalik Mons ability from step 1, creating two 1/1 Goblin creature tokens.
The Goblins enter the battlefield, triggering Mana Echoes twice, adding CC for each Goblin you control.