how to use dungeon cards mtg Descent - Adventures in the Forgotten Realms #255 (English) Adventures in the Forgotten Realms

You can, at instant speed, do three things, but the Mana Leak won't counter anything, so what this does instead is bounce up to three things which can set back folks deeply, bounce two and replace itself, draw three cards when the bounce isn't needed, or bounce once and draw twice

This creature card's power and toughness are each equal to the number of nonland permanents a player controls

Also, there are always ways to build decks in colours that dont make sense, there are a few Blue Aggro decks, but it isnt a common thing, and you shouldnt be trying to break the mould with your first deck

Since picking a creature as a Ring-bearer makes it legendary, you should carefully consider which you choose to be your Ring-bearer