10 Yargle and Multani Gnshhagghkkapphribbit
This card is incredibly difficult to find in NM condition, but you can expect those copies to exceed the currently listed market price for this card
The first step is to figure out what deck you want to build
Rather, the previous sale was most likely hype-driven and in hopes that the market in general would just go up and up and up, so someone only bought back then because they were confident in making a quick buck
Phasing came from a different time, when downside mechanics like Echo, Cumulative Upkeep, and Snow (which was more often punitive than beneficial in Ice Age) were somehow all the rage
The honest conclusion for most collectors is this: open packs for the experience and for set completion at the Common-through-Rare level, and buy high-rarity singles directly for any specific card you genuinely want