Telim'Tor's Darts This one is admittedly a bit of an inside joke with my friends, but it doesn't take much to explain why we find it hilarious
Not only is it a 4/5 attacker with flying, vigilance, and trample any time you want her to be, but if you want her to sit back you can turn a small creature into a threat each combat
Prosper, Tome-Bound decks can play fairly or enable busted combo turns thanks to the mana production coupled with all that delightful card draw
Can often be sung by a character of the right cost to conserve ink
It allows two permanents to 'merge' into a bigger, more horrific entity, like Graf Rats and Midnight Scavengers melding to make Chittering Host
To put these cards together, simply glue around the edges (about three-quarters of the way), fill them with candy, and glue them closed