Hopefully they will keep the templating to:

"Play: Heal up to 3 damage from a creature. If you healed 3 damage, gain 1[Æ]."

but they also have this:

"Play: Heal 1 damage from each creature. Gain 1[Æ] for each creature healed this way. (Damage is healed by removing that damage from the creature. "Each Creature" includes your opponent's creatures.)"

Clearly their intent is that to be healed means you remove a token...and to be damaged means you have a token. Somehow claiming you are perpetually damaged for 0 doesn't seem to work

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Regarding the comment "with twin bolts you need to pick 2 targets"

You need to pick two if possible...if you can only pick one. That creature still takes two damage.

just like with

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Play: Choose 2 friendly creatures and 2 enemy creatures. Shuffle each chosen creature into its owner's deck.

If you have 0 creatures and your opponent has two...this card sends those two back to their deck.

8 hours ago, AskForAlex said:

A question I had regarding 'do as much as you can'.

In my deck I have the card 'Relentless Assault', an Action that reads: Play: Ready and Fight with up to three different friendly creatures, one at a time.

Say my opponent has only one creature which is defeated by my first creature I use from Relentless Assault. Then after that do I still ready two of my creatures even if I can't fight with them (do as much as possible), or should I read 'ready and fight' as one instance, where if they can't fight they can't be readied?

You could ready up to three creatures.

The thing with Guardian Demons wording is that is uses the healing done as damager later in the ability. take off as muc as you can.