Dolithan, Goblin King

first strike
whenever Dolithan, Gblin King attack, you
may pay {x}. if you do, create a 1/1 red and green goblins army creature token with "sacrifice this creature: put X +1/+1 on
target goblins army you control, where X is that creature power" and put X +1/+1 conters on it . X can't be 0.