1 Claim the Precious
Any of these cards will make an excellent commander, so dont assume a specific placement on the list has any bearing on power level or quality
Perhaps one of the most well-known and most played card that lets you do this is Aether Vial, a Modern all-star that you can tap to put a creature into play from your hand so long as that creatures mana value equals the number of charge counters on it, which you can choose to add at the start of your turn
Fundamentally, I'm not sure that Eiganjo has an easy home right now, but it's a powerful enough spell/land that it's worth keeping in mind, and it will probably show up in Modern at some point
Go-Shintai of Life's Wisdom is valuable to the deck for its ability to bring enchantments back from the graveyard to the battlefield, and it might be that Wizards chose the card for this ability alone
Prava of the Steel Legion Prava of the Steel Legions most popular partner commander is Ikra Shidiqi, the Usurper