Activate Urza's first ability by tapping Attentive Sunscribe, adding {U}.
Attentive Sunscribe triggers, causing you to scry 1.
Activate Freed from the Real's second ability by paying {U}, untapping Attentive Sunscribe.
Repeat.

Infinite scry 1

Attentive Sunscribe

Urza, Lord High Artificer

Freed from the Real

Activate Mind over Matter by discarding a card, tapping Attentive Sunscribe.
Attentive Sunscribe triggers, causing you to draw two cards due to Kenessos and Eligeth.
Activate Mind over Matter by discarding a card, untapping Attentive Sunscribe.
Repeat.

Infinite draw triggers

Infinite looting

Infinite self-discard triggers

Mind Over Matter

Eligeth, Crossroads Augur

Kenessos, Priest of Thassa

Activate Freed from the Real's first ability by paying {U}, tapping Attentive Sunscribe.
Attentive Sunscribe triggers, causing you to scry 1.
Arwen Undómiel triggers, putting two +1/+1 counters on Crystalline Crawler.
Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding {U}{U}.
Activate Freed from the Real's second ability by paying {U}, untapping Attentive Sunscribe.
Repeat.

Arwen Undómiel

Crystalline Crawler

Brad Boimler, Eager Ensign

Combos with "Attentive Sunscribe"