Activate Chivalric Alliance by paying 2 and discarding a card, creating a 2/2 Knight creature token.
Activate Ashnod's Altar by sacrificing the Knight, adding CC.
When the Knight dies, Moldervine Reclamation triggers, causing you to gain 1 life and draw a card.
Repeat.
This loop transforms raw mana and cards in hand into a self-sustaining engine by turning Ashnod's Altar into a grim recycling plant. You spend the colorless mana generated from sacrificing your creatures to fuel Chivalric Alliance's activated ability, immediately churning out a fresh Knight token to keep the sacrifice chain moving. Meanwhile, every sacrifice triggers Moldervine Reclamation to continuously refill your hand and pad your life total, ensuring you never run out of fodder for the Altar's altar.