But it's not just Vanille - you also want to get Fang, Fearless l'CieFang, Fearless l'Cie onto the battlefield so that you can meld the two into Ragnarok, Divine DeliveranceRagnarok, Divine Deliverance, because melding two cards into one big creature is a ton of fun in Commander
The Mutant Mayhem deck in black, green, and blue features everyones favorite Mothman leading the charge to buff creatures with counters and proliferate for even more
But if you truly want to slow the game down to an absolute halt, add the following Humans: Grand Arbiter Augustin IV and Thalia, Guardian of Thraben
Excellent question
Peek and Gitaxian Probe are great one-off effects for looking at an opponents hand
[c]Lord of Atlantis[/c], for example, boosts the stats of all other Merfolk, [c]Goblin Cheiftain[/c] boosts other goblins, and so on