Thrasios, because of partner and two mana in his cost makes him heavily played just by those that want the colors in their deck, or a cheap body to drop
The second way to fight Dredgealthough somewhat less effective against the more recent builds of Dredge, thanks to Creeping Chillis with sweepers that remove creatures in a way that doesn't put them back into the graveyard, like Anger of the Gods or Terminus, or with normal sweepers (like Supreme Verdict or Wrath of God) combined with graveyard disruption
This does not necessarily make those decks bad, as their power level can overcome this flaw if the combo it provides is simple enough to win games when it opens optimally
And once enough cards are floating around in exile, his activated ability can be used to pull them all from exile at once
Instead, both decks will be the first major reveals, with Jared and Dihada being revealed on August 18 at the Wizards Presents showcase, and the rest of the decks coming the day after on August 19