At the beginning of your upkeep, reveal the top card of your library. If it's a creature card that shares a creature type with a creature you control, you may cast it without paying its mana cost. If you don't cast it, put it on the bottom of your library.
![Descendants' Path (Borderless) [Secret Lair Drop Series]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/files/fbf2bd0e-986a-5190-82d3-1388656377eb.jpg?v=1777310440&width=1445)