I pulled an Ikelos HC out of the collections to do a Handcannon bounty and forgot that I had a Warmind mod equipped on my armor still. Low and behold one of my kills eventually spawned a Warmind cell and it blow my freaking mind. 🤯
I guess it makes more sense that Bungie reintroduced the Ikelos weapons this season. That means there's five weapons this season that can be used to spawn Warmind cells, in addition to the four you may have saved from last season.