Flashback spells, recursive threats, and Madness cards can make those discards even more valuable, while the Elemental tokens can help close out games or keep you alive until you find the cards you need
This is a deck that can go very wide and also very big (with Pridemates, which grow constantly due to all your life gain triggers and lifelink), so it can get huge rewards from giving a creature trample
Kotis itself gets huge over time, growing stronger with each reanimated creature
Vehicles Heart of Kiran is a vehicle that's still quite underrated for Cube
Definitely one of the cards to look towards for an aggressive Giants deck
This is a ridiculous source of card advantage, and it's indestructible, so your opponent has very few ways to deal with it