Sheila, The Dragontamer

When Sheila, The Dragontamer enters the battlefield, create a 3/3 dragon with flying and "If a creature you control dies that was named Sheila, The Dragontamer, sacrifice this creature" that's Black, Green, and Red
All dragons enter the battlefield under your control
Dragons you control get +/+1
{b}{r}{g}: Create a 3/3 Dragon Creature token with flying that's Black, Green, and Red