The draw-two-lose-two half is why this maindecks in TMT, a midrange goodstuff format where arriving at the late game with cards still in hand is how the attrition mirrors break. The legendary uncommons and the mythic Turtles end games the turn they resolve, so the deck that draws into the second removal spell, or into its own bomb, wins the long turns. Night's Whisper at a one-mana tax is a fair rate when removal is medium and games run deep enough to spend three mana on refueling.
The pick band sits P1P5 to P1P7 in any black deck. It climbs in WB Equipment, which wants the card flow to keep finding new carriers for Bespoke Bō and Novel Nunchaku after the first one eats Stomped by the Foot. BG Food is the more interesting home: the life payment is real, but the deck is already making Anchovy & Banana Pizza to buy it back, and the discard mode has teeth against the same color pair's slower Food engines.
The modality is the appeal, not a sideboard switch. Both halves live in the card every game; the discard mode is the one you point at a legendary-heavy hand to strip a two-color payoff before they untap with it, and the draw mode is the default when the board is stable and you want gas. The reason it isn't an earlier pick is Stomped by the Foot, the cleaner two-mana answer in black. When you need to kill something, that is the pick; Shredder's Revenge is what you take a slot later, once the removal count is healthy and the deck wants fuel for the grind.
