Seven mana isnt something you can just put in your average deck and expect to happen though, but if your deck is slow or has some acceleration, Coliseum Behemoth should be fine to play
Head online and play a few matches with these decks, too
Delirium - As long as there are four or more card types among cards in your graveyard, Insects and Spiders you control get +1/+1 and have deathtouch
A normal rare may be cheap, while the foil extended-art, showcase, borderless, raised foil, textured foil, or serialized version of that same card can be worth much more
Emerald characters also tend to have keywords like ward and evasive, which make interaction through actions or challenges a nightmare for opponents
Thats right, we have another Commander deck for MTG that uses The Monarch as a way to draw more cards