Loxian Sabertooth

Trample, Shapeshift
Loxian Sabertooth cannot attack unless there is another creature with shapeshift on the battlefield. Whenever this creature deals damage, all Loxian-type creatures you control get a +1/+1 counter.
"There is innumerable forms by which the Lox can take. Be wise upon what you see in these unfathomable plains, students."-Artes the First Prefect to his students.