Arasta could be a fun deck to build to specifically sink your friends Melek, Izzet Paragon storm deck, but otherwise there are just better options
It reduces the risks that are found on Journey to Nowhere but it also makes a decent blocker for your opponent thus making it a pretty terrible aggressive card
Being able to answer challenges both on the battlefield and on the stack is the Obscuras key strength, and it has lots of ways to do it
In the case of the former, you can even sacrifice Boromir in a key moment if you know that someone is holding free interaction that can stop someone else from winning the game
Theres lots of good ones to spread around, from backup to mentor to planeswalker buffs
Double Strike + Deathtouch Double strike plus deathtouch allows a creature to instantly destroy any creature it deals damage to in the first combat step before the blocking creature has a chance to deal any regular damage itself