Why does the rune pool empty after the draw phase (in addition to at end of turn)?

Ruling: The rune pool empties after the draw phase to prevent potential exploits where players could float resources from exhausting/recycling runes during the Beginning step, then immediately re-channel those runes for excessive resources in a single turn.

Sequence:

• Rune pool empties after the draw step
• Rune pool empties again at end of turn

Nuances:

• Without this rule, if your rune deck is empty, you could exhaust and recycle two runes for 2 Energy and 2 Power during the Beginning phase, then immediately re-channel those runes and have up to 14 Energy and Power that turn
• The rule prevents floating energy to save up for another turn
• When you exhaust/recycle runes, resources are added to your "rune pool" and can float temporarily until used or the pool is emptied
• Emptying the pool is automatic and different from spending resources down to 0