This is done through cards like Vivi, Guttersnipe, and Coruscation Mage
If you play a Song action, then you may exert a Character with a cost equal to or higher than the Song to play it for free
A six-cost character with four willpower and five health that can be shifted for four ink and quests for two lore, Little John, Resourceful Outlaws stat line isnt exactly making headlines, but his killer ability will certainly beckon defensive players to build around him
Finally, she also blocks other characters from exerting to sing songs, as a passive ability
Why not get free cards while you wait with Chicha Dedicated Mother
Its even worth stretching your mana for or risking this sitting in hand for a while, but the triple-blue mana cost is intense enough that you do have to do some work to get there