Gain enough story counters as more tokens enter and slowly reap some extra card draw over time
Emet-Selch starts as a mediocre looter, but once you have 14 cards in your graveyard, he flips into a 6/6 Yawgmoths Will
Currently, my favorite conceptually is TrickbindThassas Oracle is a very common way for a player to try to win, and if you have Trickbind theyre basically guaranteed to lose instead of win unless theyve protected it with a Silence type effect
Given these cost much, much more because they include alternative art treatments and additional chances to grab rare cards, we'd still recommend Play Boosters as a way into the hobby, or if you're just looking to build up a sizeable collection of cards without spending crazy money
Rather, its the incredibly broad and varied options its capable of knitting together into totally unforeseen strategies that creates an imbalance, and the ease with which even a modest burst of early triggers can snowball into a massive resource lead or outright victory