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card
watcher
power
uncommon
Battle hymn is a very consistent and cost efficient power that is a decent addition to most decks. Since the attacks that it generates retain, they can easily be played on a wrath turn as a big finisher. This is also the case for divinity. It is usually never bad to have one copy, but be aware that if you play 3 or more copies of this power you might not be able to empty your hand enough to actually draw on the next turn due to the retain effect.

Frozen Egg
uncommon
Whenever you add a Power card to your deck, Upgrade it.
B+

Mummified Hand
uncommon
Whenever you play a Power, a random card in your hand costs 0 for the turn.
B-

Bird-Faced Urn
rare
Whenever you play a Power, heal 2 HP.
B+

Dead Branch
rare
Whenever you Exhaust a card, add a random card to your hand.
S

Gambling Chip
rare
At the start of each combat, discard any number of cards then draw that many.
A
No watcher, colorless or curse cards antisynergies.