Lunatic Cultist

{x}{x}{r}{t}Deal X damage to X target creatures
{x}{x}{u}{t}Tap X target creatures they don't
untap in their controller's next untap phase
{5}{w}{t}Deal 15 damage split among 5 different
targets
At the beginning of your endstep
Flip a coin If its heads create a 2/2 cultist
creature token with
"Whenever this creature dies create a legendary
5/5 dragon creature token with flying"