mtg kefka card - 23-004R - Hidden Trials Each opponent sacrifices a permanent of their choice Kefka Court Mage Altered Borderless

The J22 version of Rhystic Study has new art and has a value of around $36 on the secondary market

Averaging just under $10, its likely at a short-term high point before the price bottoms out closer to $6

The first and most obvious would be the actual dungeons, of which there are just a few

Starting with the airbend effect, which can temporarily tuck away creatures, Aang builds momentum quickly as your creatures leave the battlefield

Commander also gives you the option to throw a bunch of good stuff cards into a pile, add in some mana fixing and table interaction, and just have it work

A super safe ramp card I am always happy to play