Not about the Damage Prevention Step, or whether or not you should be able to use mana from Basalt Monolith to untap Mana Vault, but more about some new promos and B&R updates in sanctioned Magic
Enigma Ridges Fun: 4 Impact: 3 Chaos: 2 Giving a Land Tax effect to everyone except whoever has the most lands is a pretty good leveling effect, although putting the lands into your hand rather than onto the battlefield tapped limits how immediately useful the effect is
For safekeeping MTG cards in mint condition, the toploaders are your best option
While his low-ish power might make it tricky to get excess damage in at first, with a few buffs or other damage-causing spells before combat you'll be raking in those sacrifices
Even without the 9/9 trampling Sauron, thats still likely to be a fair amount of presence on the battlefield
These cards are usually rare and, therefore, more expensive