The one innovation was that, while Innistrad only had DFCs that were a creature on both sides (and one planeswalker on both sides at mythic rare), Dark Ascension had two DFCs that started as artifacts, one of which wasn't even a creature on the back face
While the two first modes speak for themselves and would already constitute a strong magic card, the last mode is more format dependent and as it stands, it is a very effective ability in the current Modern metagame
Its only a matter of time until something gets printed that completely breaks this card and Ill be waiting patiently for the day that happens
If the name doesnt sound familiar, Guild Kits were 60-card preconstructed theme decks built around a specific Ravnica guild, pulling cards from across every Ravnica set released up to that point
You simply cannot just counter spells forever and expect to be invited back to the table next week
Since then, older cards with this ability have retroactively been given reach