Elspeth, Storm Slayer is a mythic Legendary Planeswalker — Elspeth card from Tarkir: Dragonstorm Promos (PTDM), collector number 11s. Current market price: — (foil $44.48), TCGplayer market prices via Scryfall.
If one or more tokens would be created under your control, twice that many of those tokens are created instead. +1: Create a 1/1 white Soldier creature token. 0: Put a +1/+1 counter on each creature you control. Those creatures gain flying until your next turn. −3: Destroy target creature an opponent controls with mana value 3 or greater.