Each color combination has the predictable signpost uncommon youd expect, showing off what to focus on when building that archetype
If you can hit an Artifact with it that will be nice, but the second ability is a little too random, though it will certainly be useful most of the time in the later game, as it effectively draws you a card
The ability triggers whenever a player casts an instant or sorcery spell that targets only Mirrorwing Dragon and no other object or player
Included in my list of best cards from the set, Youre Welcome is an easy way to keep your opponent from building up too many characters on the board, removing their capacity to build board advantage
That's always my starting point, which is then tweaked to suit the individual deck's strategy and further tweaked with playtesting
Since it has flash, you can bring it into play after attackers and blockers have been declared and exile anything that dies during this combat, potentially getting rid of problematic creatures permanently while providing card advantage for you over the course of the game