In 2v2 Riftbound, can players play normal/base speed spells during their teammate's turn?

Ruling: Yes, teammates can play untagged (base speed) spells during their teammate's turn, but not permanents or activated abilities.

Sequence:

• When both the turn player and their teammate want to play something at the same time, the turn player takes precedence
• The turn player's action happens first
• The teammate can play their spell afterwards once everything resolves and timing allows, provided the turn player doesn't want to do anything further first

Nuances:

• This applies to spells only, not activated abilities
• Normal timing restrictions still apply
• Permanents cannot be played during a teammate's turn