3.) Infection! -Gift Evoltion
Reduce your max HP by 1. Owner is not affected by this card.
Owner not affected is the standard property of Gift Evolutions.
(if there is space, it is customary to write it out in () to indicate that it is a reminder)
5.) Living Nightmare - Gift Evolution
You can not re-roll any (Hearts) this turn unless you pay the owner of this card 1 (energy)
Wording is a bit off, maybe:
"You can not re-roll any (Hearts).
You may pay the owner of this card 1 (energy) to ignore this affect until the end of your turn."
7.)No where left to hide - Temporary Evolution
At the beginning of your turn you can discard this card to force each other monster to either lose 2 (energy) or 2 HP.
If you kill at least one other monster then shuffle this card back into your evolution deck.
Who chooses what the loss is? If the opponent gets to choose, great!. If Zombie gets to choose then this is probably WAY too good (and somewhat pointless as 99% of the time you'd go for Hearts).
The 'shuffle in' wording doesn't need "at least one". Either the card is shuffled in, or it isn't. You can't shuffle it in twice.
8.) Beyond the Grave - Permanent Evolution
Only on other player turns.
You can purchase the top card from the discard pile.
This card has a few issues.
First off, there technically is no discard pile.
This falls under one of those things where enough other games have a discard pile that you just assume there would be one here, but the rules make no mention of it. Cards are just 'gone' when discarded.
Secondly, due to there not being a discard pile, there is no proper discard order when 'sweep'ing the cards. You'd have to make a ruling on that, probably just 'whoever sweeps orders the cards'.
Last, and most importantly. I'd start by limiting it to either before OR after your opponent buys anything (one or the other, not both). Do not allow the purchase to be 'during'.
Should also probably limit it to once per opponent's turn, on the off chance you 'buy' a Discard-card and can then just buy it again.