In general, thats not terribly productive, but if you have a creature with an ability that triggers when it enters the battlefield or when it dies, this lets you trigger it again
But beware: Pokmon card investors face risks like demand drops, low grading, damage, or theft
Though its a very expensive card, as an artifact there are plenty of ways to either reduce its cost or to cheat it out
All of the Merlin cards give an ability when returned to hand, like the Merlin Crab which gives another character +3 strength when challenging, when they are played, and when they leave play (which can be in the same turn for a super boost), and Madam Min returns cards to hand when played
Id also suggest all ten Ravnica Signets, Chromatic Lantern, Coalition Relic, Fellwar Stone, Network Terminal, or many other artifacts that tap for extra mana that are better of a rate that Altar of the Lost
For players who enjoy unconventional approaches , this deck offers a mix of grindy control and explosive payoffs