Seasons Past, Mastermind's Acquisition, and Walk the Aeons

Prerequisites

• Seasons Past in the library
• Mastermind's Acquisition in hand
• Walk the Aeons in hand
• each turn available

Steps

1. Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one Cast Mastermind's Acquisition by paying its mana cost, searching your library for Seasons Past and putting into your hand
2. Cast Seasons Past by paying , returning Mastermind's Acquisition and Walk the Aeons from your graveyard to your hand and putting Seasons Past onto the bottom of your library
3. Repeat

Results

• Infinite turns
• Lock