Avatar of Woe becomes an incredibly cheap and effective threat after some milling gets done
To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as multikicker), then apply any cost reductions
4 Sage of Hours, and Ezuri, Claw of Progress Another Simic combo, this one is great because it's a one-card combo using a potential Commander, the Phyrexian Elf Ezuri, Claw of Progress
Typal decks should consider Raise the Palisade, which is a way to help push damage through and reset the board, without interfering with your own deployment
(2021-06-18) If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs