Rhystic Syphon

The Rhystic question usually rides on stakes too low to sweat: pay a little or let a counterspell fizzle, pay a little or let an extra card slip through. This one bolts the same toll onto a payoff that makes paying feel almost reasonable right up until you do the arithmetic. The "pay or" clause reads like an off-ramp; the alternative is a ten-point swing, five drained off the target and five back onto the caster. At sorcery speed the player firing it chooses the moment, leaning on a board state where the opponent has committed their mana elsewhere or simply cannot spare three without abandoning their own turn. The toll is the entire design. A flat five-life drain for five mana would be filler; routing it through a Rhystic payment turns it into a negotiation where neither answer is comfortable and a mana-light opponent has no answer at all. It is the drain spell rebuilt as a dilemma, doing most of its work in the pause before it resolves, while the opponent counts lands and decides what five life is worth keeping.