Runadi, Behemoth Caller

Big-creature payoffs usually arrive as the victory lap: the reward once a deck has already gotten where it was going. This one moves the payoff to the front of the swing, addressing the ramp plan's oldest frustration: the turn your seven-drop lands and does nothing but stare across the table. Cast a creature spell with mana value five or greater and it resolves fatter than printed, the counter surplus scaling with size so the truly enormous spells gain the most. That surplus feeds the second clause directly: three counters flips on haste, and the largest creatures clear that bar the instant they hit. The two abilities are one mechanism read twice, closing the recurring gap between ramping into a threat and the threat actually mattering. At 1/3, this stays a support piece by design, its only combat contribution the green it taps for; it inflates your fatties without ever needing to be one. And note precisely where the reward is gated: the trigger keys on casting a creature spell, so hard-casting a twelve-drop off ramp collects the counters, while reanimating or otherwise cheating a behemoth straight onto the battlefield yields nothing at all. It rewards the honest cast specifically, not every route to a big body, which quietly narrows the shell it wants around it into something closer to a genuine ramp deck than a reanimator pile.