Whenever one or more Cats you control deal combat damage to a player, destroy up to one target artifact or enchantment that player controls
One involves lock-down auras like Pacifism variants that take combatants out of the equation while draining opponents over time
Creatures : Viscera Seer, Krosan Tusker, Golgari Guildmage, Charnelhoard Wurm, Deadwood Treefolk, Hissing Iguanar, Pyreheart Wolf, Falkenrath Noble, Flayer of the Hatebound, Bone Shredder, Shriekmaw, Indrik Stomphowler, Lyzolda, the Blood Witch, Savra, Queen of the Golgari, Anger, Sakura-Tribe Elder SekKuar is particularly nice with effects that sacrifice creatures, since you get the effect plus you get a bonus 3/1 creature to go along with it
"At the beginning of your end step, proliferate." It hard to imagine a line of text that embodies "long-term growth" better than that
Heres a list of the most valuable Commander Masters reprints