But Daxoa and Kelsien want to do very different things - casting enchantments and killing creatures, respectively - and I'm not sure trying to smush the two themes together will yield great results
Midnight Clock is a great midgame mana rock that enters the battlefield untapped like the Lapis Orb of Dragonkind, generates blue mana, and refreshes your hand after an average of 3 turn cycles right around the time your hand is starting to get a little empty
If not, let me know in the comments!
Enduring Innocence and Welcoming Vampire play a similar role
A 4/4 merfolk wizard that requires its controller to champion a merfolk, whenever this creature deals damage to a player, its controller can sacrifice a merfolk to take an extra turn after this one
Heck, Strength of the Harvest gave us one in the manabase