Dreadhorde Twins

Amass was the mechanic built to make a swarm feel singular: instead of scattering tokens across the board, you pile counters onto one growing Army whose Zombie type feeds the tribe around it. Vertical growth like that has a familiar weakness, though, which is that a single oversized ground creature is trivial to chump-block into irrelevance no matter how many counters it carries. The static ability handing trample to your Zombie tokens is the answer to exactly that problem, and it does quiet double duty. The Army you build is itself a Zombie, so the second line applies to the very creature the first line just grew, converting a stack of +1/+1 counters into damage no single blocker can absorb. The body reads as a modest 2/2 that leaves an Army behind, but the interaction is what matters: it turns counters-on-one-creature, which normally struggles against a developed board, into a threat that punches through it. Because the trample grant is static rather than a one-time trigger, every subsequent amass effect you resolve inherits it automatically, which is where the card earns its place as connective tissue rather than a standalone threat. It wants a critical mass of Zombie tokens more than it wants to be cast early, and it rewards a build that treats one large, trampling Army as the entire aggressive plan.