As a stand-alone card, Vexing Puzzlebox is okay, but with a deck loaded with dice to roll, it can quickly turn into a repeating artifact tutor
Card Draw From ETB Effects Various spells can draw a card when they enter the battlefield
However, taking it all together, Relic is the best of them all since it can constantly exile a card from a graveyard and thus keeping it empty while also being able to exile all graveyards at once and draw a card from it
Cunning Rhetoric Cunning Rhetoric doesnt guarantee card draw, but if you arent drawing cards, it means that the threat of card advantage has deterred your opponents from attacking you
It gives you a cheap, small damage sweeper in the early game, or you can foretell it to be a more impactful sweeper later on
1 Territorial Hammerskull