For example, if you control a 2/2 creature with evolve and a 1/3 creature enters the battlefield under your control, its toughness is greater, so evolve will trigger
But first, keep in mind this accounts for near mint quality
Milling yourself with Brain Freeze is also a good option if you have Underworld Breach with Black Lotus or Lions Eye Diamond
The uptick in draw-hate, is found on cards like the pinging Orcish Bowmasters, Razorkin Needlehead and Scrawling Crawler, and the bigger effects on Sheoldred, the Apocalypse and Xyris, the Writhing Storm which play exceptionally well with mass draw-sevens
Titan of Littjara Titan of Littjara has the Distant Melody effect tied to it, and you can even blink it to draw more cards