It only lasts until you upkeep as mentioned, but then you get an unblockable creature
Thanks to eminence, this is something that is easily done with your low mana-value Vampires
Instead, it's the fact that it allows the player to draw two cards when an equipped creature dies that pushes it over the top The potential card advantage is unreasonable for a single mana investment, especially since the -1 to Toughness makes it extremely easy for the player to kill their own creatures on command
Aeve is a legendary creature with storm, letting you make token copies of it for each spell that has been cast before it
Lets talk about your most recent contribution to Magic in The Brothers War you had six cards total, the five Commands & Visions of Phyrexia
For Night Wanderer, the top layer works because the cards are tied to the set story rather than feeling randomly expensive