A six-mana 7/7 that can only ever be chump-blocked is a closer, and the question TMT poses is whether the tribal line ever gets to matter. The card was built to anchor a green Boar shell, with the single-blocker clause extended to every Boar you control. The set doesn't supply that pool: the tribal axis here is Turtles and villains at uncommon, so in practice you cast Rocksteady for the first line and the Forestcycle, and the Boar text is a payoff waiting on creatures that aren't in the format.
That lands it in BG Midrange and GU Ramp as top-end, around P1P7 to P1P9, after removal, the hybrid uncommons, and equipment are locked. The body earns the slot because Sneak appears on 59 cards, which fills boards with small evasive bodies that can't profitably gang-block a 7/7. The single-blocker clause turns a go-wide ground stall into a one-for-one trade or a chump every turn.
The catch is that this set does have Trample on 22 cards, so the no-gang-block clause isn't the unique evasion it reads as on its own page; you are competing for that lane. And the removal punishes the rate directly. Grounded for Life destroys it mid-attack and costs less against a tapped creature, so they can ambush the alpha strike. Stomped by the Foot answers it before it connects. Six mana into a threat one common kills, in a format where black decks run two or three such pieces, is the rate you tolerate, not the one you want.
Forestcycling for two is the insurance that lets it maindeck without dragging the curve. When you're light early, you pitch it to find a Forest; the 7/7 was never doing work on turn four anyway. Resolve it late and it ends games in two swings against anything without a flier wall.
is the saving grace: when the board is wrong or you are flooding on the wrong colors, the 7/7 becomes a land, which is exactly the flexibility a six-mana tribal payoff needs in singleton. Outside a Boar deck, it is a vanilla evasive beater, and most green decks have better six-drops.