
Sorcery
Until end of turn, creatures you control gain trample and get +X/+X, where X is the greatest power among creatures you control.

Classic green +3/+3 and trample anthem for the same go-wide finisher.

Cheaper trample anthem giving infect for one-shot kills.

Enchantment that grants +5/+5 to swarm for lethal alpha strikes.

Premier creature version of Stampede, granting trample and +X/+X.

Creature granting +X/+X, trample, and haste like Stampede.

Repeatable Stampede-style buff on attack triggers each combat.

Green payoff for big creatures; alternate anthem-adjacent finisher.

Activated overrun-style +3/+3 and trample anthem repeatedly.
You check the power of your creatures as Overwhelming Stampede resolves. For example, if you control a 2/1 creature, a 2/2 creature, a 2/4 creature, a 4/1 creature, a 5/5 creature, and a 5/6 creature at that time, each of your creatures gets +5/+5 and gains trample until end of turn.