Perhaps the side effect would be a significant self-consumption after the sacrifice, but that's still a smaller price than burning the fire of life!
Moreover, casting powerful magic exerts considerable mental pressure on the mage, wouldn't deceleration alleviate the mental oppression, thus sharing the pressure over a longer period, reducing the rebound that the mage itself endures.
Wu Di's reminder opened a brand new door for Long Dangdang, providing him with a different understanding of the Gently Absorb Slowly Regurgitate Spirit Furnace. However, all this would only become clear after experimentation.
After leaving the spirit furnace storage area in the Magic Temple with Long Dangdang, instead of letting him leave, Wu Di retained him. As a mentor, he wanted to teach Long Dangdang for a while to stabilize his Elements Resonance, and also help him truly comprehend the properties of his spirit furnace, integrating them into his own power.
Overhanging Bright Moon Courtyard.
