Some trigger when something else happens during the battle e.g
One card serving as an accelerant, discard outlet, and card draw is remarkably efficient, even at 4 mana
This set is full of cards that have connections with previous fan favorite cards or mechanics
This state led Kamahl to try to force all of the Pardic tribes to follow him
You've also got Regeneration (Boneknitter), graveyard love (Corpse Connoisseur), graveyard hate (Crypt Creeper), life loss (Organ Grinder), tutoring (Corpse Harvester), edicts (Fleshbag Marauder), Necropotence variants (Graveborn Muse), and can even destroy the occasional enchantment (Quagmire Druid)
all promo cards from The First Chapter set through the Azurite Sea set have a gold double wedge symbol, while promo cards since the Archazias Island set have a diamond surrounded by a layered circle