Typal decks can leverage upgraded effects in almost every important category, just by making the necessary deckbuilding commitment: ramp, draw, recursion, tutoring, removal and defensive interaction, even better color fixing
After all, anything printed before Exodus used a black expansion symbol regardless of rarity, so the symbol color won't help you tell what rarity a card is
Yes, all of those Digimon are prevented from leaving
Borderless Triumphant Cards Twelve rare creatures, 3 mythic rare creatures, and one mythic rare planeswalker (you guessed it, theres Tezzeret, Cruel Captain again) have the borderless triumphant card treatment
And it gives you back the GG right away
While it would be sweet to see mill break Standard, considering Startled Awake rotates in a couple months, it's probably wise to sell your copies now and spend the money on cards for post-rotation Standard