All of these decks are fun to play, with the tiny mana costs ensuring big decision points early in the game and the inherent race-against-the-clock tension thats part of being the beatdown
Trazyn the Infinite + Mana Rocks + Staff of Domination The dream is Trazyn the Infinite copying a mana rock like Gilded Lotus in your graveyard, then using Staff of Domination to untap Trazyn and do it again for infinite mana, which Staff then turns into your whole deck or infinite damage
Venser is particularly good in that he is utility bounce that can hit lands as well as other permanent types
This is a special action, not an activated ability
Silence The synergy between Isochron Scepter and Silence is a very potent lock that can take an opponent out of the game, and that can be expanded to EDH if you have ways to untap the Scepter
I think this will see quite a bit of play, and Id be surprised if it didnt