Deliver Unto Evil

Regrowth for four cards is an absurd rate, and the entire design exists to keep you from ever getting it clean. The card is built as a conditional: fulfill the flavor requirement (control the Elder Dragon the set was named around) and you retrieve all four; fail it, and your opponent gets to strand two of the four in your yard. That "opponent chooses two" clause is the balancing mechanism doing the heavy lifting, and it is a genuinely uncomfortable one because you never pick the four cards in a vacuum. Choosing four bombs invites the opponent to bury the two you want most; choosing a spread of situational cards blunts their choice but dilutes what you recover. The self-exile clause seals it: this is a one-shot with no graveyard loop, so the recursion has to count. Stripped of its planeswalker payoff, the effect functions as a hand-of-the-opponent hard split, closer to Fact or Fiction run in reverse, where you assemble the pool and they hand you the leftovers. Most of the time the Bolas condition goes unmet and you are simply paying three mana to draw a targeted, opponent-mediated two-for-four out of your own graveyard. That is a fair floor for a card whose ceiling, on the rare turn the condition lines up, is one of the largest single-card recursion effects black has ever been handed.