Giganotosaurus

Trample
Giganotosaurus must attack every available turn. Every time it deals damage to a player, add a +1+1 counter.
"Fighting a Giganotosaurus directly is never a good idea, as its rage rapidly grows with every hit it takes. With this rage, it builds increasing reserves of energy to use, making its iron-jawed bites progressively more deadly and enhancing its stamina."