Iconic Cards: Counterspell, Ponder, Damnation, Jace, the Mind Sculptor Popular Decks: UW Control, Jeskai Control, Taking Turns, Esper Control 3 Midrange Midrange decks are popularly said to solve problems, not create them. In other words, these decks are sort of designed to be able to win against every archetype, although they wont bulldoze over anything (the way aggro often wrecks control, for example)
Well, thanks to the extremely overpowered Companion mechanic, you can do that via Jegantha, the Wellspring
Also put a +1/+1 counter on that creature if this spell was cast using teamwork
If it's a land card, put it onto the battlefield tapped
Card draw and +1/+1 counters are other common rewards, as seen with Well of Lost Dreams and Heliod, Sun-Crowned, one of the best mono-white commanders
The gates give you ways to control the board, namely Gates Ablaze to keep the board under wraps and Guild Summit to help tear through your deck, which is critical to help you chain Nexus of Fates