Coliseum Behemoth

Green has always paid for its enters-the-battlefield value with body size, and this is that trade at its plainest: a 7/7 trampler for seven that hands you a choice on arrival. The modal split is the interesting part. Naturalize-style artifact and enchantment removal has long been green's specialty, but it usually arrives on a cheap dedicated spell, not stapled to a beater. Bolting the effect to a large trampling body means the card never dead-draws against an opponent with no permanents to break: when there is nothing worth destroying, it simply replaces itself by drawing a card. That "destroy something or refuel" fork is a quiet hedge against the classic problem with dedicated hate: you want the answer when it matters and a live card when it does not. Because the value is an enters-the-battlefield trigger rather than a cast trigger, it can be denied entirely by countering the creature before it resolves, and the mode gets chosen as the trigger goes on the stack, not held open while the turn develops. It is also a one-time event tied to arrival, not a repeatable ability. What you get is a green midrange payoff that stays relevant across matchups, either clearing a problem permanent while presenting a real clock, or landing seven power of trample and a card in hand. Nothing here is subtle, and it does not need to be; the design is about making a fatty pull double duty.