The Book of Mechanix

{4},{t}: Target creature gains the keyword ability of your choice until end of turn. (Trample, Menace, Lifelink, Prowess, etc.)
Whenever one or more creatures you control with a keyword ability attacks, scry 1. Then, if there are 5 or more creatures you control with a keyword ability attacking, draw a card.
The Book of Mechanix holds all keyword abilities that have been, are, and ever will be.