First of all, it fits with one of the premises of our list, which is that spot removal spells are very good in the format because they are important against both aggro and midrange being a midrange deck, you want to be able to deny your opponent spot removal because the Unholy Annex core features a relatively unusually high number of expensive and powerful threats
Know what is in the color pie, both from the official sources and from the more updated, but less official sources
The player with the higher total cannot activate monster effects or declare an attack, until the end of the next turn
So, you can have one copy of Thalia, Guardian of Thraben on the battlefield, but you cannot have two copies of Thalia, Guardian of Thraben
Attack and Defense The offensive and defensive power of a Monster