Gorthos, King of Draconians

Kobolds, Dragons, and Wurms you control have
+2/+2, Trample, and Flying
Whenever you cast a Wurm Spell create a 2/2
Red Dragon
Whenever you cast a Kobold Spell create a 5/5
Wurm
Whenever you cast a Dragon Spell create 2 0/1 Kobolds