X SPELL Return 1 Synchro Monster you control to the Extra Deck, and if you do, Special Summon 4 "Flower Cardian" monsters from your GY, then, draw 1 card and show it, then, if it is a "Flower Cardian" monster, you can Special Summon it, ignoring its Summoning conditions
Cavendish gives you extra Don, making it easier for you to activate Leader effect and maintain your field development
You, the player, then have your energy reserve, which remains even as phases and turns pass
Split second is a mechanic thats rarely seen, but thats because you need to be very careful with it, as it means opponents cant respond to it with most actions
Anybody with this many hands is gonna be pretty grabby, and Hecahands just cant stop themselves from grabbing your opponents monsters