The symbol of blue is a blue water drop
As a very general rule for Limited, I would look to play something like this: 1 mana: 02 2 mana: 46 3 mana: 35 4 mana: 24 5 mana 13 6+ mana: 02 That's far from hard and fast, but it's a good place to start
As a stand-alone card, its mediocre
Which is where this crop of M21 cards really comes in handy
Bloodthirsty Adversary Is Bloodthirsty Adversary technically an upgraded Goblin Dark-Dwellers
The options are: Match colors exactly: If you simply pick two colors (lets say black and red) and look for cards, Gatherer shows you cards that are mono-red, mono-black, Rakdos, any two color combination with black or red, and three-or-more-colors combinations that include either of the chosen colors