Blood Moon Players love the utility of nonbasic lands to help them create tokens, scry, draw cards, or remove permanents
Each opponent attacking that player does the same
Id run this in any deck with enough buffs or evasion enablers to push the merfolk through
Like all great Commander effects, Basion of Remembrance hits all your opponents at once, though you still only gain one life on each trigger
Destroy target permanent is an effect that can be used to destroy any permanent, including lands
A strong SST version should answer the buyer question immediately, show a route table, separate official facts from market signals, place product/category/wholesale routes early, and give a risk checklist that protects the buyer from bad purchases