Those Auras and Equipment will phase in at the same time that creature does, and they'll phase in still attached to that creature
Arena players got digital-only cards and periodic rebalancing in Alchemy and Historic, collectors got a glut of Secret Lairs, Dungeons and Dragons players got their own standalone set, and those of us with a penchant for Modern got a real monkeys paw scenario with Modern Horizons 2
Spiders are a MTG creature type that's had a sprinkling of creatures in most every set
While I still think it's too big for typical backpack use, if you do choose to carry it around in a backpack it should survive without a problem
I don't see any benefit in doing so, personally
The star reprint in this Secret Lair is Dogmeat himself, masquerading as Yoshimaru, Ever Faithful