Phantom Steed + Eternal Witness + Walk the Aeons Combo

Phantom Steed on the battlefield.

Eternal Witness in exile.

Walk the Aeons in hand.

Eternal Witness is exiled by Phantom Steed.

An opponent cannot block and kill Phantom Steed.

each turn available

Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one

Declare Phantom Steed as an attacker. It triggers, creating a token copy of Eternal Witness that's tapped and attacking.

When the Eternal Witness token enters, it triggers, returning Walk the Aeons from your graveyard to your hand.

Repeat each turn

Infinite turns

Lock