Ego Drain
Coercion effects that let the caster pick the card discarded have always charged a premium for that precision: Thoughtseize takes two life, Inquisition of Kozilek only reaches nonland cards of mana value three or less, Coercion asks for three mana flat. Here the premium is not paid in life or restricted targets but in your own cards. For a single mana you strip the best nonland card from an opponent's hand, and if you don't control a Faerie, you exile a card from your own hand to do it. Spend one card casting the spell, spend a second card to the exile clause, and you have traded two cards of your own to remove one of theirs: strict card disadvantage, run for the tempo swing and the surgical hit against combo and control rather than for value. That conditional is the entire design pivot. Control a Faerie and the exile clause vanishes, collapsing this into a one-mana surgical strike with no downside; skip the tribe and it becomes an expensive, self-punishing way to answer a specific problem card. Discard spells rarely ask you to build toward them; this one folds a tribal payoff directly into its cost line, handing near-free targeted disruption to a deck committed to a fragile, evasive creature type and quietly declining to reward anyone who isn't.
