Ground Pounder
{1}{G}
Creature -- Goblin Warrior
2/2
{3}{G}: Roll a six-sided die. ~this~ gets +X/+X until end of turn, where X is the result.
Whenever you roll a 5 or higher on a die, ~this~ gains trample until end of turn.
Steel Squirrel
{2}
Artifact Creature -- Squirrel
1/1
Whenever you roll a 5 or higher on a die, ~this~ gets +X/+X until end of turn, where X is the result.
{6}: Roll a six-sided die.