When you add a rune with a seal, does it float, and if so, can you use it for anything or is it restricted?

Ruling: When you add a rune with a seal, it floats and is not restricted in use. However, seals pay for power costs, not energy costs.

Nuances:

• Floated power and energy are lost at the end of your turn
• Floated power and energy are also lost at the draw phase (to prevent floating energy from before awaken for start of turn effects)
• Floated power and energy persist through showdowns