Manabond

The proposal is brutal: empty your hand of lands all at once, then throw the rest away. The discard clause is the entire design. Without it, dumping a fistful of lands onto the battlefield for green mana would be a free ramp engine; with it, the card forces you to spend your hand the turn you intend to cash it, turning it into a payoff for a deckbuilding posture rather than a generically good ramp piece. The natural partner is a graveyard you actually want to fill, which is why it has always lived alongside reanimation and recursion: the cards you discard are not lost so much as relocated to a zone you can profit from later. The end-step timing is what makes the math defensible. Because the trigger resolves on your own turn after you have already played a land and cast your spells, you bank a full turn of normal development before the dump, and the lands arrive untapped, available to fuel an end-of-turn or opponent-turn play right away. The constraint is not a delay on the mana; it is the hand you have to empty to get it. That is the trick worth admiring: the rate reads as absurd until you reach the instruction to discard your hand, and that single clause is what gives the card an archetype rather than just a power level.