Gruul Spellbreaker

Riot (This creature enters with your choice of a +1/+1 counter or haste.)
Trample
During your turn, you and Gruul Spellbreaker have hexproof.

Stonebrow, Krosan Hero

Trample
Whenever a creature you control with trample attacks, it gets +2/+2 until end of turn.

Tattermunge Witch

{R}{G}: Each blocked creature gets +1/+0 and gains trample until end of turn.

Herald of Ilharg

Trample
Whenever you cast a creature spell, put two +1/+1 counters on Herald of Ilharg. If that spell has mana value 5 or greater, Herald of Ilharg deals damage equal to the number of counters on it to each opponent.

Proud Wildbonder

Trample
Creatures you control with trample have "You may have this creature assign its combat damage as though it weren't blocked."

Quartzwood Crasher

Trample
Whenever one or more creatures you control with trample deal combat damage to a player, create an X/X green Dinosaur Beast creature token with trample, where X is the amount of damage those creatures dealt to that player.

Boartusk Liege

Trample
Other red creatures you control get +1/+1.
Other green creatures you control get +1/+1.

Threat

Create a 4/4 red and green Beast creature token with trample.

Thrash

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control.

Thrash // Threat

Khenra Charioteer

Trample
Other creatures you control have trample.

Ghor-Clan Rampager

Trample
Bloodrush — {R}{G}, Discard Ghor-Clan Rampager: Target attacking creature gets +4/+4 and gains trample until end of turn.

Borborygmos

Trample
Whenever Borborygmos deals combat damage to a player, put a +1/+1 counter on each creature you control.

Deus of Calamity

Trample
Whenever Deus of Calamity deals 6 or more damage to an opponent, destroy target land that player controls.

Polis Crusher

Trample, protection from enchantments
{4}{R}{G}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
Whenever Polis Crusher deals combat damage to a player, if Polis Crusher is monstrous, destroy target enchantment that player controls.

Archetype of Aggression

Creatures you control have trample.
Creatures your opponents control lose trample and can't have or gain trample.

Ashroot Animist

Trample
When this creature attacks, another target creature you control gains trample and gets +X/+X until end of turn, where X is this creature's power.

Scuzzback Marauders

Trample
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Furious Spinesplitter

Trample
At the beginning of your end step, put a +1/+1 counter on Furious Spinesplitter for each opponent who was dealt damage this turn.

Atalan Jackal

Trample, haste
Skilled Outrider — Whenever Atalan Jackal deals combat damage to a player, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Wilderness Elemental

Trample
Wilderness Elemental's power is equal to the number of nonbasic lands your opponents control.