4 K'rrik, Son Of Yawgmoth Phyrexia Is Back An absolutely fascinating creature for a mono-black deck, Krrik, Son of Yawgmoth, effectively lets you trade your life total for mana, so long as that mana is black
There are other token-doubling options like Primal Vigor and Doubling Season, which can be problematic due to their symmetrical effect or expensive pricetag, respectively
Sage of Hours Sage of Hours works best with Ezuri, Claw of Progress for a sleek infinite turn combo, but it only takes a counter doubler or two, a little proliferation, and a card like Innkeeper's Talent to produce a similar effect
Budget options include Terramorphic Expanse and Evolving Wilds, while upgraded versions use shock lands and fetch lands
Some of the most valuable Pokmon cards feature unique symbols or no symbols at all (as in some early Japanese cards)
In 0 decks according to EDHREC