The Secret Lairs were amazing in their own right, too, giving format staples
Collective Brutality is an absolute beating against any hyper-aggressive deck, because each of its three modes is very good against them
It costs five colorless mana to use and has an ability that allows the player to tap any number of Creatures within the player's control with a total power of 2 or more
Yes those are mine, and I just realized that is prohibited on this forum
This allows you to add two Magician Pendulum Monsters that are face-up in the extra deck (as a result of being sent from the field to the graveyard) to their hand, instantly giving you the material needed for Pendulum Summons
Even better, Kodama acts as a form of ramp because you can get basic lands from your library equal to the number of creatures that landed combat damage on your opponents that turn