Ugin, the Spirit Dragon, All is Dust, Duplicant and Dispatch are all quality pieces
10 Omnath, Locus Of Rage Play Your Lands And Watch Your Army Grow Similar to the aforementioned Ruric Thar, Omnath, Locus of Rage is a commander who creates great sums of value from you simply playing the game the way you already would have had it not been present
If it's Will, it requires a ridiculous amount of mana to sacrifice clues, so maybe
Bartel is neat but boring and somewhat impractical
Mega Altaria ex Espeon Using only Psychic energy, Igglybuff, Swablu and Espeon can put the opposing Active Pokemon into sleep which syngergizes with non-ex Darkrai's ability to deal 20 damage per turn
5 Timeless Wisdom Free Cycling Cycling is one of Magic's oldest mechanics, having been around since 1998