Pod and Affinity dont change much whether they are fighting Jund or Tron
Nevertheless red and blue (especially blue) have plenty of great effects that will help you slice through your library like a Buster SwordBuster Sword carving through an Ice FlanIce Flan
For example, if an effect allows you to cast a permanent spell with mana value 3 or less from among cards in your graveyard, you could cast Bottomless Pool this way, but not Locker Room
Foe built up a board full of hasty Goblins with Krenko, Mob Boss and Goblin Chieftain
The average deck doesnt scry often enough to make this a meaningful card, but the combination of scrying and proliferating could pull this together for slower decks
Thrakkus the Butcher is a little on the smaller side compared to its full Dragon friends, but when it attacks, it doubles the power of all Dragons you control until end of turn