That's exactly what Graaz, Unstoppable Juggernaut does for you
Crypt Ghast Most perks Ive listed about Nirkana Revenant, Magus of the Coffers, and Bubbling Muck apply to Crypt Ghast as well, so rather than extoll the virtues of Urborg, Tomb of Yawgmoth and X spells for the 4th time, Ill instead start by saying 4 is a very reasonable mana cost for a one-sided mana doubler before moving on to the other half of Crypt Ghasts text box
On her very first assignment, she got her spies to blackmail a corrupt politician into stepping down from office
Play Boosters, Collector Boosters, Commander decks and more
It also features Invasion of New Capenna // Holy Frazzle-Cannon, which is easy enough to transform with just four defense counters, and its transformed cannon building up more stat advantages for each arriving Incubator token