With a ward effect of sacrificing a creature, Vein Ripper was so good in formats like Pioneer and Explorer, that it caused Sorin, Imperious Bloodlord to get banned since the planeswalker could cheat out the Vampire as early as turn three
With Jayemdae Tome, a slower pace and mass removal cards like Wrath of God or even Balance, which was unrestricted for an unbelievable amount of time, you could sit in the Tower and all but dare your opponent to try and do significant damage to you without overextending while the game swung inevitably towards one in which your deck would dominate
You cant gain life for the rest of the game
Marath, Will of the Wild is one of the best Naya commanders, and works great with enrage
See, I was manipulated, had something of mine stolen, denied Aaron, and eventually will have my check from him bounce -- all characteristics of the color blue
To clarify, these are the best-selling Edge of Eternities cards so far, thanks to data from TCGPlayer , but these arent competitive recommendations