Access to a 0-mana exile effect gives you a defensive tool that doesnt care about counters or uncounterable effects
If you maximize its value that could easily be three or four cards from one spell getting returned, and maxes at five
Black Biotransference On the other side of the representation coin, black got the lions share with a dedicated deck and a place in all three others (though blue is in three of them, most of its representation is multicolor)
Savage Ventmaw can replace Demanding Dragon, since the Demanding Dragon only targets a single opponent and sacrificing just one creature likely wont make that big of a difference to the match
These are blue, green, red, white and black
The art evokes that Halloween Disney feel and brings back memories of the Headless Horesman and the main Disney three