Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.
Harmonize {X}{G}{G}{G}{G} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by an amount of generic mana equal to its power. Then exile this spell.)
![Nature's Rhythm (Borderless) [Tarkir: Dragonstorm]](http://tothetablebgc.myshopify.com/cdn/shop/files/ce0ee309-b6c4-455d-8af6-48d8ac1426cb.png?v=1776608278&width=1445)
