({1} magic symbol) ({U} magic symbol) available plus enough mana to cast Time Walk and Scholar of the Ages each turn.
Steps
Cast Time Walk by paying its mana cost, causing you to take an extra turn after this one.
Cast Scholar of the Ages by paying its mana cost.
When Scholar of the Ages enters the battlefield, it triggers, returning Time Walk from your graveyard to your hand.
Move to your next turn.
Activate Dour Port-Mage by paying ({1} magic symbol) ({U} magic symbol) and tapping it, returning Scholar of the Ages from the battlefield to your hand.
Dour Port-Mage triggers, causing you to draw a card.