It is a Water card illustrated by PLANETA Tsuji
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
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
Can Two Players Have the Same Planeswalker in Play
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
For players who enjoy unconventional approaches , this deck offers a mix of grindy control and explosive payoffs