Doing so removes the initiative from the game, though this doesn't affect any existing dungeons in the game
Most decks can answer them in some form. This design philosophy becomes apparent on Barbflare Gremlin, a brand-new creature that appears in this deck, which combines the rules text from two older enchantments, Manabarbs and Mana Flare
Shes the perfect Midrange tool for when your opponent is packing graveyard hate, which would otherwise sink this kind of list
If the enchantment copied by the token had any "when [this permanent] enters" abilities, the token also has those abilities, and they'll trigger when it's created
These increases make PSA grading prices worth paying for the right cards
In Yuriko, Wizards crafted a form of ninjutsu that works the way you want it to and then gave a pay off to using ninjutsu and unblockability together to quickly steal games