Granting double strike to every dragon that attacks turns even modest boards into terrifying threats
At the time the Invasion and Odyssey block Prerelease promos were printed, all six of the promosRaging Kavu, Questing Phelddagrif, Fungal Shambler, Stone-Tongue Basilisk, Laquatuss Champion, and Glorywere the only Magic cards in their respective languages
The Courts Monarch is a mechanic that doesnt exist in a game of Commander until someone plays a card that introduces it
Card Advantage, Permission, and Threats Mana production aside, the cards in a blue-based control deck can be separated into one of three classes, card advantage spells, which allow you to draw extra cards or search for cards and add them to your hand, permission spells that deny your opponent their plays, or cheap threats which can close out the game once the opponent's game plan has been thwarted
Diplomatic Relations Diplomatic Relations gives one of your creatures a quick boost+1/+0, vigilance, and a one-sided fight to take out a blocker or pesky utility creature