It can't be the target of spells or abilities, its static abilities have no effect on the game, its triggered abilities can't trigger, it can't attack or block, and so on
The pros is that blue has the tools to deal with any type of spell
Plumeveil Speaking of annoying creatures, Plumeveil has surprised many players in combat, flashing in as a 4/4 with flying and defender to block and destroy an unsuspecting attacker
Charting your course through Adventures in the Forgotten Realms starts with the legendary creatures
Pair him with Umbral Collar Zealot, Open the Graves, and cards that recycle creatures from the graveyard for a satisfying, grindy win-con
A mainstay in almost every Commander deck these days, this card was a must-have in a deck with numerous X mana cards