I like to spend five mana to turn it over at the end of someone's turn before untapping on my own and having it ready for another Twincast
There are other Synchro Monsters ready to pick up as well, including "Stardust Dragon." Each pack contains 8 cards, with the first 4 cards always consisting of ones from Master Pack and the last 4 consisting of featured cards from this pack
For one this monster has the same style of attack boost but with 1000 points rather than 500
Another option is an approach that incorporates the Cat-Oven combo: Creatures (28) 4 Gray Merchant of Asphodel 3 Midnight Reaper 4 Gutterbones 1 Orzhov Enforcer 1 Cavalier of Night 4 Rankle, Master of Pranks 4 Murderous Rider 3 Ayara, First of Locthwain 4 Cauldron Familiar Lands (26) Spells (6) This deck has fewer disruptive elements and is a bit worse at getting devotion, but its alternate plan with Cauldron Familiar, Witchs Oven, and Midnight Reaper can be quite strong, and its overall cheaper, which makes Castle Locthwain a little better
6 Jinnie Fay, Jetmir's Second Cat Token Extraordinaire While Jinnie Fay is not expressly a Cat commander, she can easily be built that way