It scales extremely well in long multiplayer games and supports many popular archetypes
Invasion Tri-Lands In the Invasion set, Wizards introduced a cycle of lands that enter tapped and tap for one color, but they can also be sacrificed to add two mana in allied colors
Artifact Artifact (CTRL to add secondary) Counters Fight Rigging Hideaway 5 (When this enchantment enters, look at the top five cards of your library, exile one face down, then put the rest on the bottom in a random order.) At the beginning of combat on your turn, put a +1/+1 counter on target creature you control
Then you discard a card with Mind Over Matter to untap the bell
Was Progenitus supposed to be the awesome over-the-top card or was Child of Alara
Rampage of the Clans Rampage of the Clans is pretty bad unless you want to give your opponents a bunch of 3/3 Centaurs