Get the EX you already have Metas change, and drawing the wrong card at the wrong time can destroy even the most powerful decks
The official product description mentions a Borderless Source Material card, [and] an Extended Art Commander card, in each MSH Collector Booster
A plane teeming with enormous monsters, where human bonders relied on their pet creatures to survive, Ikoria is best described as Pokmon meets Godzilla
The biggest Standard deck of the moment relies on Agatha's Soul Cauldron, which means you'd actually rather have your Vivi in the graveyard than on the field
For starters, having access to another bit of graveyard hate is huge in older MTG formats such as Modern and Legacy
Serras Emissary Serra's Emissary makes an excellent reanimation target