In search for important upgrades I found that upgrading some cards changes the nature of how they play in decks. For example Animate Weapon costs 1
when unupgraded, but when you upgrade it it costs 1 untyped quantum. This means it can be played in mono decks without air towers or air mark.
I made this list with aim to make difference between non-essential upgrades that only change the basic parameters of card and those that have larger impact on deck's usefulness. Hopefully this will guide players when looking for cards to upgrade.
Better ability:
Lobotomizer (reduced cost)
Damselfly (gain
)
Nightfall (+1 attack for all)
Virus (infect all enemies)
Grey Nymph (reduced cost)
Gnome Rider (gain
)
Plate Armor (+3 armor)
Pulverizer (reduced cost)
Lycanthrope (reduced cost)
Ash Eater (gain
)
Otyugh
Golden Hourglass (reduced cost)
Anubis (reduced cost)
Photon (gain
)
Freeze (+1 duration)
Arctic Squid (+1 duration)
Trident (reduced cost)
Shard of Divinity
Shard of Gratitude
Shard of Readiness
Ability change:
Firefly
Dissipation Shield
Chaos Seed
Pandemonium
Mutation
Fallen Elf
Rage Potion
Fire Nymph
Toadfish
Breeds better creatures:
Firefly Queen
Boneyard
Mummy
Graboid
Fate Egg
Pharaoh
Quantum changes:
Flying Weapon (untyped)
Nova (entropy)
Luciferin (untyped)
Sundial (untyped)
