A mode where prince is racing against time and everytime he kills an enemy time gets extended, if timer reaches zero prince dies. there should be like hourglass icon on top middle of the screen right next to healthbar. hourglass will count time, reaching fountains will extend time greatly, also also prince can sacrifice portion of time instead of health if player choses so on weapon upgrade altars. There also can be medalions which for example gives bonus time on every enemy killed or more extreme version gives you bonus time if you do not kill single enemy in biome.
#Sands of Time mode
final flax
sonic spear
Very Hell Clock, I like the idea 🙂