Rashmi, Eternities Crafter

Description

Rashmi, Eternities Crafter (PKLD-184p) is a legendary creature card printed as a Kaladesh promo that’s a green-blue Elf Druid. Whenever you cast your first spell each turn, you reveal the top card of your library and may cast it without paying its mana cost if its mana value is less than the triggering spell, otherwise you put it into your hand. The ability triggers on the first spell you cast each turn (including opponents' turns) and resolves before the spell that caused it to trigger, enabling potential tempo or card-advantage plays.