Tempest Hart // Scan the Clouds

The split resolves a curve problem in both directions. Scan the Clouds is cheap blue card selection that filters toward the top of the deck and tucks the Elk into exile to be cast when the game has opened up; the creature half then grows a +1/+1 counter every time you cast a spell with mana value 5 or greater. That cast trigger is the key: the counter lands the moment the big spell hits the stack, not when it resolves, so it pays out even against a counterspell and even when the expensive spell fizzles. The two halves pull against each other, though, because the loot digs you toward the top end while also binning the very spells the body wants you to cast, so the design only clicks in a list deep enough on high-end payoffs to feed both jobs. Trample is the finishing detail: the counters are there to push a growing threat through chump blockers rather than to inflate a defensive stat line, so the reward for casting big is a body that closes rather than one that merely survives. It is a green design that asks you to build steep, an enabler for a top-heavy curve stapled to a reward for having built one, with the counter engine on the front and the loot on the back describing the same plan from opposite ends of the game.