If Leyline of Mutation is in your opening hand, you may begin the game with it on the battlefield. You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast.
Life thrives in the Hauntwoods, but it follows its own laws, unbound from the natural order.
![Leyline of Mutation (Extended Art) [Duskmourn: House of Horror]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/files/492fe01d-03ef-5bea-9d00-c6e7d038555e.png?v=1737736232&width=1445)