There are also tons of combos that generate infinite mana and allow you to draw your entire deck, eventually finding the combo that'll win the game
Sidisi's last ability triggers any time creature cards are put into your graveyard from anywhere in your library, not just from the top
Instead, it's the fact that it allows the player to draw two cards when an equipped creature dies that pushes it over the top The potential card advantage is unreasonable for a single mana investment, especially since the -1 to Toughness makes it extremely easy for the player to kill their own creatures on command
I think there are ways to efficiently increase the chances of having a storm count (Nykthos, Shrine to Nyx to generate a ton of mana the turn we want to resolve this, for instance), but since this deck is meant for beginners, Im going to keep the mana base simple
It is important to note that you cannot cast one half of a split card and then choose to cast the other half on another turn