The fact that you can force your opponents to block it and then get an additional combat may work itself out to be a great removal strategy
The eight MTG card types are: Sorceries Instants Lands Creatures Artifacts Enchantments Planeswalkers Battles Sorceries Sorceries (and also Instants) represent magical effects you can cast, like a fireball or a summoning spell
Eye of Nidhogg is great for keeping opponents life totals go down, and really helps Yshtola in this build as it triggers both of her abilities
I've also focused on cheap protection for Cloud like Loran's Escape, and something that nobody really talks about is Green's "draw cards equal to power" which is bananas here like Hunter's Insight which is easily a 3 mana draw 7+, I find it kinda silly that all the precon guides are focusing on more expensive and less efficient draw options like Sram, Senior Edificer or even Sword of Fire and Ice when you can just out-value all of that with cards that are less than a dollar
I dont feel comfortable identifying the key cards in the deck as a result
While this is already a handy use of two mana, whenever a dragon enters the battlefield under its owner's control, that player can deal X damage to any target where X is the number of dragons they control