Battle Mammoth

Green's classic vulnerability is the surgical removal spell: the one-mana answer that trades cleanly against a five-mana threat, killing the body while costing the ramp player enormous tempo. This trigger flips the incentive. The clause keys off any permanent you control (the Mammoth itself, a mana dork, a random enchantment), so the moment an opponent points a spell or ability at anything on your side, you refill. Remove the 6/5 and they have spent a card to draw you one; leave it and the trample closes on schedule. Because the deterrent reads so broadly, it works even when the Mammoth is the least appealing target on the board. Note the seam, though: edicts and other effects that make you sacrifice or that target the player, not a permanent, slip past the trigger entirely, which is exactly how green midrange has historically been unwound. Foretell ties the package together: exiling it face down for smooths the early curve, tucks it out of range of hand disruption, and lets it arrive later without telegraphing a five-drop. The design tension is that the card-draw clause only pays when opponents interact, so against a durdling control shell it sits idle and you are left with a large-but-plain beater. Against decks built to dismantle a creature-based plan, it forces a genuine dilemma: interact and feed the engine, or ignore it and eat the clock. A punish card wearing the costume of a top-end fatty.