Smolder, The Fiery Fledling

Whenever a creature an opponent control dies
you get a dragon practice counter

If you have 10 dragon practice counters Smolder gains Flying and +3/+3, If you have 25 smolder also gains +3/+3 and first strike , If you have 50 Smolder also gains +3/+3 and double strike if you have 100 Smolder also gains "When this creature attacks alone, target player loses the game"