Flying When Boreas Charger leaves the battlefield, choose an opponent who controls more lands than you. Search your library for a number of Plains cards equal to the difference, reveal those cards, put one of them onto the battlefield tapped and the rest into your hand, then shuffle.
![Boreas Charger [Commander 2021]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/b9c3d636-e689-5e9e-9cf4-f16206a7656f_f5fbdb45-57a5-41cd-a9a3-c8bde8d4e96b.jpg?v=1698559871&width=1445)