Does tapping Kai'Sa give you an extra rune for spells, or does it give you 1 power (the resource from recycling)?

Ruling: Tapping Kai'Sa gives you 1 "power" (represented by symbols), which is the same resource you get from recycling a rune, not "energy" (represented by numbers) which comes from tapping runes.

Nuances:

• Numbers on cards represent "energy" which you get from tapping runes or certain effects
• Symbols represent "power" which you get from recycling runes or effects like Kai'Sa's
• If you have 2 ready runes and tap Kai'Sa for 1 power, you cannot activate a spell that costs 3 energy unless you have other ways to generate energy