finale mtg cards of Eternity Price copy each of those spells twice Finale of Devastation (Borderless) -

This applies to very old cards most of the time, but some rare versions of cards have their cost raise in a similar way (such as Kaladesh Masterpieces or Zendikar Expeditions)

Pantlaza, Sun-Favored An interesting Naya commander, Pantlaza, Sun-Favored favors creature-based combos, especially with Food Chain

The second chapter is a mass-bounce effect for all non-Phyrexian creatures, and the third chapter lets you cheat-cast your spells for free

Arguably the best lands matter commander out there thanks to its colour-identity options, although my friend The Gitrog Monster would put up a good fight

They provide extra resources to help you play expensive spells early and are focused on utility