Opposition Agent Tutors are powerful in a 100-card singleton format, so a card that stops them can be extremely powerful
At a higher mana cost this might have been a bad card, but as a one mana instant it's good enough to warrant its restriction in Type 1
7) Protection and resilience: assume people will touch your stuff Your commander will get removed
Thats because it reads: The owner of target permanent shuffles it into their library, then reveals the top card of their library
BLACK Since we know we are already getting Phyrexian Obliterator, we likely just have one slot to fill
Creatures (22) 4 Beanstalk Giant 4 Bonecrusher Giant 3 Yorion, Sky Nomad 1 Glasspool Mimic 2 Alrund, God of the Cosmos 4 Cyclone Summoner 4 Cosima, God of the Voyage Lands (31) Spells (27) Now this deck I actually like