Day of the Dragons, Demon of Fate's Design, Enchanted Evening, Cloudstone Curio, and Trostani, Selesnya's Voice Combo

Prerequisites

Cast Day of the Dragons by paying 7 life due to Demon of Fate's Design
When Day of the Dragons enters the battlefield, its first ability and Cloudstone Curio trigger
Resolve the Cloudstone Curio trigger, returning nothing to your hand from the battlefield
Resolve the Day of the Dragons trigger, exiling all creatures you control and creating that many 5/5 Dragon creature tokens
When the Dragon(s) enter the battlefield, Cloudstone Curio triggers that many times
Resolve all but one Cloudstone Curio trigger, returning nothing to your hand from the battlefield
Resolve the final Cloudstone Curio trigger, returning Day of the Dragons to your hand from the battlefield
When Day of the Dragons leaves the battlefield, its second ability triggers, causing you to sacrifice all Dragons you control and return all cards exiled with Day of the Dragons to the battlefield
When the creatures that were exiled by Day of the Dragons enter the battlefield, Cloudstone Curio triggers that many times, and Trostani triggers for each creature except itself
Resolve all Trostani triggers, causing you to gain life equal to the collective toughness of the other creatures that entered the battlefield
Resolve all Cloudstone Curio triggers, returning nothing to your hand from the battlefield
Repeat
If creatures you control excluding Trostani have total base toughness 8 or greater, this combo nets infinite life