I dont think I need to tell you that this is a bulk rare
I find that to be a bit too pushed
Youve got classics like Deep-Cavern Bat for disruption, and Inti and Fear of Missing Out for card selection
In Constructed, your Contraption deck needs at least fifteen different Contraption cards, and no more than one of each
There are a few cards that are just good old fashioned merriment, such as Grand Master of Flowers, a four-mana planeswalker that can stop creatures blocking, find Monk of the Open Hand from your library or graveyard, and eventually become a 7/7 Dragon God with flying and indestructible
Transform (Innistrad, Dark Ascension, Shadows over Innistrad, and Eldritch Moon