black dragon yugioh card CrystalCommerce Red-Eyes - SBCB-EN167 - Common - 1st Edition Trading Single Cards Red-Eyes Black Dragon (Anime Art)

The oldest foils, from sets like Urzas Legacy and 7th Edition, frequently run for more than $300 a pop

My only hesitation with her is that we had a card with a similar ability in set one in the Floodborn Dr

Most dragons are in the 3- to 6-mana range with the discount from The Ur-Dragon, so you dont need much below that

Embodiment of Agonies enters the battlefield with a +1/+1 counter on it for each different mana cost among nonland cards in your graveyard

Soulbond is a very odd mechanic, and one that hasn't been returned to much since it was first printed in the original Innistrad block, but Deadeye Navigator is probably the most iconic of the cards with the mechanic due to the ability to go infinite with some pretty innocent looking cards (plus Dockside Extortionist, but we dont need to worry about that one in Commander anymore!)