The goal is to offer you a bit of a smorgasbord, a package built around removing counters here, a package for returning Enchantments to play en masse there, maybe some Enchantress creatures, and you'll be able to craft your mana base and the deck will be essentially built
Birthing Boughs from Modern Horizons makes you a token with changeling to expand your army of whatever creature type youre running
Its far more effective in Hammertime lists hurling Colossus Hammers around and carries Cranial Plating better, slips through more board states for ninjas, and so on
I find it hard to review her without the context of The Spear of Leonidas as well, and I think as much as it feels like the Spear should have auto-equipped, I think itd be tough to justify her at even four mana for that much value
Yes, Erase is a perfect answer to Outpost Siege