Elspeth, Sun's Champion is a mythic Legendary Planeswalker — Elspeth card from Theros (THS), collector number 9. Current market price: $2.76 (foil $16.47), TCGplayer market prices via Scryfall.
+1: Create three 1/1 white Soldier creature tokens. −3: Destroy all creatures with power 4 or greater. −7: You get an emblem with "Creatures you control get +2/+2 and have flying."