Oh wait, it's a little too late for that
Search your library for a creature card with mana value equal to 1 plus the sacrificed creatures mana value, put that card onto the battlefield with an additional +1/+1 counter on it, then shuffle
If you like the idea of an aggressive Esper Tokens deck that focuses on combat with a dash of Artistocrats and Lifegain subthemes for added spice, then Forces of the Imperium is for you
The sneakier way is with effects that tax your opponents as they attack you, like Ghostly Prison
Experience: Opening set boosters is more about the excitement of collecting, whereas draft boosters are about strategic gameplay
As of March 30, Amazon has the Magic: The Gathering Avatar The Last Airbender Play Booster Box listed for $124.99 , its lowest-ever price according to price tracker camelcamelcamel