The Elder Dragon War 
Enchantment — Saga
Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.) I — This Saga deals 2 damage to each creature and each opponent. II — Discard any number of cards, then draw that many cards. III — Create a 4/4 red Dragon creature token with flying.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL