Portner's other projects and releases include Terrestrial Tones with Eric Copeland of Black Dice, a split 12" with David Grubbs, and an LP with his then-wife Kristín Anna Valtýsdóttir (aka Kría Brekkan) called Pullhair Rubeye.
He released his debut solo album "Down There" on October 26, 2010.

In April, 2013, it was announced that Portner had formed the group Avey Tare's Slasher Flicks along with Angel Deradoorian, former member of Dirty Projectors, and ex-Ponytail drummer, Jeremy Hyman.
Portner describes the band as "[a] group of three hippies on a road trip through the backwaters of 2013s rural music scene fall prey to a murderous cannibalistic band making..." Their debut album Enter the Slasher House came out internationally on April 7, 2014, and a supporting west-coast tour was announced soon after the album's release.
Ahead of the album they released a video for ‘Little Fang’ directed by Portner's sister and featuring a puppet created by Jim Henson’s Creature Shop.
In 2017, he appeared on Grateful Dead member Mickey Hart's solo album, RAMU
Portner's other projects and releases include Terrestrial Tones with Eric Copeland of Black Dice, a split 12" with David Grubbs, and an LP with his then-wife Kristín Anna Valtýsdóttir (aka Kría Brekkan) called Pullhair Rubeye. He released his debut solo album "Down There" on October 26, 2010.
In April, 2013, it was announced that Portner had formed the group Avey Tare's Slasher Flicks along with Angel Deradoorian, former member of Dirty Projectors, and ex-Ponytail drummer, Jeremy Hyman. Portner describes the band as "[a] group of three hippies on a road trip through the backwaters of 2013s rural music scene fall prey to a murderous cannibalistic band making..." Their debut album Enter the Slasher House came out internationally on April 7, 2014, and a supporting west-coast tour was announced soon after the album's release. Ahead of the album they released a video for ‘Little Fang’ directed by Portner's sister and featuring a puppet created by Jim Henson’s Creature Shop. In 2017, he appeared on Grateful Dead member Mickey Hart's solo album, RAMU
Avey Tare