mtg commander deck box ultra pro Sidekick 100+ XL Magic the Gathering Final Fantasy Deck Box, Prohex - Magic:

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This one-mana instant permanently exiles any creature while giving its controller life equal to the creatures power, providing clean answers to threats at the lowest possible cost

This means that any removal spells that say destroy or kill. Do not affect cards with indestructible, and they do not die when damage that would reduce their health to zero or less would kill them

His ability Daring Exploit says whenever he banishes another character in a challenge, you gain two lore and each opponent loses two lore

They may be good in very specific or very niche situations but you would almost never seriously consider putting them in a competitive deck