Maybe they were of the same creature type, or showed a similar creative element, or just played well together
Add in that its a mono-colored card that will be easy to add in to multiple decks in the future and Doom Whisperer deserves to be at the top of the list
Ikra Shidiqi, the Usurper Turning toughness into lifegain is a solid game plan, and Ikra Shidiqi, the Usurper does it effortlessly
Floodborn characters born from the game fictional concept of a "cataclysmic ink flood": an event unleashed when a forbidden book was opened, changing heroes and villains alike into more powerful forms, though many magical "pieces of lore" were lost in the ink flood as well
While the engine at the heart of the deck was Cadaverous Bloom it would not have been even remotely competitive without Squandered Resources, as banning this card proved