From memory Shadowspear was around five USD the first few weeks after THB released Because of its relevance in the Theros story arc, I think were mainly going to see it getting reprinted in supplemental sets or universes beyond sets because reprinting it in Amonkhet or Lorwyn would make little sense
While you don't want too many of that effect, as you already have 1 colorless rebate off your commander, it works well if you have enough two mana targets where it makes sense
For this reason, the most accepted and accurate interpretation of Vinicunca is: Narrow pass or mountain neck. This name perfectly describes the natural geography of the area, as the mountain is located in a zone where the trail narrows between Andean elevations, serving since ancient times as a natural passage for local communities
Silver Shroud Costume: A protection spell tacked onto an evasion equipment, the flash makes this a good alternative to Whispersilk Cloak
Let me know and share your experiences with the mechanic in the comments or in the Draftsim Discord