Smothering Tithe In multiplayer, no one is going to be paying this tax, at least not in the early, mid, or mid-late games either until they have a ton of mana end-game
Decks that want to draw cards with Fact or Fiction are very unlikely to also be able to optimally use a Skullclamp, decks that have the mana to bust out a five or more mana draw spell are similarly unlikely to also want to use the economic but slow Ancestral Visions
Instead, its one of my least-favorite cards, and this is coming from someone who loves Frostburn Weird
Crashing Drawbridge is quietly the best card in any non-red, creature-heavy deck by giving your team haste, allowing for a big swing from something youve just drawn off the top of your deck
While not immediately obvious as a group hug commander, being able to tactically save your opponents from combat damage could set you up for some highly political plays