mtg lost caverns of ixalan collector booster box TCG Stamped Signature Art Card replaces the Art Card in 10% of Set Boosters MtG Lost Caverns of Ixalan

Turn one Sol Ring into turn two four-mana play represents a tempo advantage that opponents struggle to overcome

I suspect it will see play in the absence of other options, but players will probably not be excited by it, since there is a vast canyon between the power level of the two options

Thelon's Curse on the other hand forces your foes to leave their Blue creatures tapped

Ghalta, Primal Hunger Ive seen this creature be cast as early as turn 3 or 4, and I can imagine some play patterns allow you to cast it even sooner

The indestructible counter will hopefully allow you to take advantage of the doubling effect and reduce the effectiveness of your opponents board wipes (the scourge of token decks), and makes Mondrak an excellent token commander

You can still buy a sealed box with 60 FE boosters for about $150-200, and that very fact makes it less appealing as "true old school"