this is my UBR draw/discard deck, just looking for any way to improve it or speed it up. any criticism is welcome.

Land

4 Badlands
4 City of Brass
4 Underground Sea
4 Volcanic Island
1 Library of Alexandria
1 Tolarian Academy


Creatures

4 Magus of the Jar
2 Steel Wall
3 Wall of Souls


Instant / Sorcery

1 Demonic Tutor
1 Ancestral Recall
1 Time Walk
1 Vampiric Tutor
1 Wheel of Fortune
1 Timetwister
2 Wheel and Deal
3 Winds of Change


Artifacts / Enchantments

4 Teferi's Puzzle Box
4 Underworld Dreams
4 Megrim
1 Memory Jar
2 Isochron Scepter
2 Caltrops
1 Mox Jet
1 Mox Sapphire
1 Mox Ruby
1 Black Lotus

Sideboard

no official sideboard, i just kind of swap out cards as i feel the need. the deck seems pretty solid as is right now.