Delve is used to great effect on a few cards, but more ways to cast huge spells for less while still triggering the higher cost for Rootha is an easy upgrade
Number 5 This is like a Black Luminate Primordial, except your opponent won't get any life - you get it instead
Each Draft Booster contains 15 Magic cards and 1 token, Helper card, or ad card, with a combination of 1 card of rarity Rare or higher, 34 Uncommons, 910 Common cards, and 1 Land card
They also have strong card draw abilities, which can pair up considerably well with Krark, the Thumblesss focus on spellslinging
Maxxing out Valgavoth The key feature this guide wants to focus on is Valgavoths final ability, Whenever an opponent loses life for the first time during each of their turns, put a +1/+1 counter on Valgavoth, Harrower of Souls and draw a card. Not only does this give us some nice card draw, allowing us to manage whats in our hand, but it allows us to grow the commander into a truly terrifying flier
Aggro tends to prey on Control decks, Midrange can outclass Aggros threats, and Control can outlast Midrange