Abdel Adrian, Gorion's Ward | Karmic Guide | Mercurial Pretender

Cards

Cast
Mercurial Pretender by paying its mana cost, choosing to have it enter the battlefield as a copy of
Abdel Adrian.
Put the original
Abdel Adrian into your graveyard due to the legend rule, causing
Karmic Guide to return to the battlefield from exile.
Karmic Guide and
Mercurial Pretender's abilities trigger.
Resolve the
Mercurial Pretender ability, choosing to exile
Karmic Guide until
Mercurial Pretender leaves the battlefield and creating a 1/1 Soldier creature token.
Resolve the
Karmic Guide trigger, returning
Abdel Adrian from your graveyard to the battlefield.
Put
Mercurial Pretender into your graveyard due to the legend rule, causing
Karmic Guide to return to the battlefield from exile.
Karmic Guide and
Abdel Adrian's abilities trigger.
Resolve the
Abdel Adrian ability, exiling
Karmic Guide until
Abdel Adrian leaves the battlefield and creating a 1/1 Soldier creature token.
Resolve the
Karmic Guide trigger, returning
Mercurial Pretender from your graveyard to the battlefield as a copy of
Abdel Adrian.
Repeat from step 2.