For more casual players who simply want to get a good, varied selection of cards that they may or may not use in their decks, Set Boosters are the best option
Counter Blitz and Limit Break, in particular, earned rave reviews for the power of their Commanders and the quality of the cards in the decks, which play strongly out of the box and don't need much tuning (if any) to be competitive
33 creature cards seem very generous at first, in terms of sacrificing and killing your own non-token creatures, this amount seems tight at some points, but this is compensated by the many tokens
Legendary Creature - Praetor Phyrexian Enhancer (CTRL to add secondary) Infecter Bloated Contaminator Trample Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Whenever this creature deals combat damage to a player, proliferate
Invasion of Ulgrotha F-Tier: Lightning Helix costs two mana at instant speedthat's the constructed-playable rate for dealing three damage and gaining three life