The reduction of the foretell cost applies only to generic mana in the foretell cost
You also need to make sure you hit your land drops, either with draw effects (Qiqirn Merchant and Adventurers Airship provide usable bodies as well as draw smoothing) or cards that directly give you lands or mana (World Map, landcyclers, Blitzball)
Overall) - Gogo, Mysterious Mime This four-drop legendary Red guy is a Red version of Clone effect, since on your combat he'll become a copy of another dork, and note that they don't need to be attacking, but with haste to swing now and then a double power boost too, great
Increasing a creature's power after attackers are declared won't cause a training ability to trigger
Of course, Control Magic wasnt the best Control Magic of all-time
Battle it out with your friends and, if you win, the card will transform into a tactical advantage