itch.io

I'd recommend obtaining fairy boosters. There's quite a number of fairy cards that get more powerful the more fairy cards you play in that booster set. Either Dark Fairy queen or fairy fire (though you'll need the particular fairy that adds more fairy fire to your deck) are entirely capable of defeating even the final boss. The light fairy side also has a powerful healing card that only gets more powerful the longer you play a match with a light fairy deck.

Also from what I recall easy actually isn't drastically easier than normal. I personally found the difficulty jump from easy to normal a let down.

One strategy is to refine a strategy to spam the height gain cards and just grow so much even if you end up losing it means nothing as you grew WAY more than you lost.

If I recall correctly:

Dark Fairy Dominance if you have 10 Corruption and at least 5 Dark Fairiess in your discard gives you 30 height a pop, Gladiator (Juggernaut I think) when shuffled back in your deck I thing gives you height based on how many gladiators you've played and does some damage, and Parasite Succubus generates height based on how many Parasites you've played, though Parasites require a good deal of technical play due to their thing of they exhaust but can create a copy if you discard them, but only once until you play a copy.