Unfortunately, you need other enchantments in play for Ancestral Mask to show its power
There are many single high value cards that have been counterfeited so watching out for fakes when it comes to vintage cards is extremely important
Although deathtouch can be found anywhere in Magics color spectrum, most cards with the deathtouch keyword can be found in black or green mana
Removing five defense counters from Invasion of Tarkir exiles it, enabling you to cast it transformed into a 4/4 Dragon with flying, trample, and an ability that deals two damage to any target whenever a Dragon you control attacks
A lot of the times they will have a big bullseye on them for your opponents, and by the time it comes around to your next turn the creature will be destroyed or exiled, so why not copy it with Jaxis and get use out of it right away with a copy that has haste
This likely means that WotC at least has a deal to get some of their printing operation up and running again, though who knows if its enough to handle the second run of Commander 2020 or the next few paper products