mtg cards with x Mana Cost: humanReadable.=[XR], 52 put a +1/+1 counter on that creature and a +1/+1 counter on X So casting cards from a

Tezzeret the Seeker I remember Tezzeret the Seeker being a much more ubiquitous card than it is now, but I dont think its ever stopped being good

Commander Masters Spoilers July 17 | Preconstructed Commander Cards Commander Masters Commander Decklists Commander Masters Spoilers July 18 | Superfriends Support Commander Masters Spoilers July 19 | Enduring Enchantments New Cards Commander Masters Spoilers July 20 | Eldrazi Support

That's a powerful synergy and a brand-new card that has a brand new ability for a reasonable three mana that fits into any deck

You draw a card and you lose a life every time an opponent puts a permanent into their graveyard

While White Knight might have built-in first strike and one more point of toughness, the pump Knights make up for this by having much more staying power in the mid to late game

Forcing everyone at the table to pay an additional three generic mana for each card they cast is absolutely back breaking and is sure to delay everyone's turns by a significant amount