mtg card crafter Plaguecrafter | Guilds of Ravnica | Modern you may cast it without paying its mana cost Custom Magic: The Gathering card

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Fable of the Mirror-Breaker also gives you some additional grinding power for long games, which is sorely needed now that you dont have The One Ring anymore

Pauper is a relatively competitive format and some of the cards used in popular deck archetypes can be expensive

And even if it came with some built in card advantage, like a Mulldrifter, we could deal with it

In regards to the original point of how much life gain you get out of Wellwisher, it might seem hard to gauge

With an abundance of evasive characters, you can reliably play Dumbo on turn six, exert two characters to draw two cards, and surge ahead