The only real downside is that mana dorks arent as reliable as lands and can be removed by a board wipe, making Leyline of Abundance less effective
Galathul Galecaller // Corvid Squall looks best suited for a blue tempo or spells-matter deck that wants to apply evasive pressure while generating incremental value, especially in formats that can leverage Storm Crow synergy or benefit from go-wide flying threats (such as casual tribal Bird builds or quirky Storm-style setups)
(2) When your opponent activates a card or effect that targets Mysterune card(s) and/or Set card(s) you control (Quick Effect): You can banish this card
She can copy Port Razer, too, but she can also copy legendary creatures
Bad Moon Rising: One of these appears in the artwork of Number 24: Dragulas the Vampiric Dragon, which unsurprisingly, references the fact that vampires are nocturnal
I'll just tell you that they are stronger than normal versions