scheme mtg cards My Wish Is Your Command (Schemes) [Archenemy Schemes] put a +1/+1 counter on that creature.) mtg archenemy scheme cards Evolving

The first was Land Tax, and the second was Necropotence

That said, there are a lot of Magic: The Gathering cards that could help make a powerful Y'shtola deck if you are looking for a deck to upgrade instead of one to play as is

Fair warning: this infection is liable to spread

Wasteland Strangler and Bearer of Silence are more examples of creatures that serve two purposes

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If you dont have a land to discard then you cant retrace, and if you dont have the mana available then you cant retrace