Anything that enters and makes a chunk of mana is worth a gander, and Im sure anything with Zirda in the CZ or as Companion will be very interested
The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text
Featured on this case is the stunning Enchanted card art of Ursula Deceiver of All by John Loren and Nicholas Kole
While tournament play is another issue, for casual Commander play, it is important to remember that Magic is a game and Magic cards are game pieces
For example, compare this to Serra Avatar which can easily be a 40/40
Getting energy for each mana you spend is an insanely good rate, and its a good reason for this on a six drop because getting that kinda generation early is kinda nuts