Runes: energy and power
This is the mechanic that trips up every new player. There is one rune deck, but two different ways to spend a rune.
0 energy
0 Fury power
0 Chaos power
0 runes touched
Remember
Exhaust for energy, recycle for power — and the same rune can do both. Exhaust it first, then recycle it, and one rune pays for two pips.