You have cumulative upkeep of one, so it doesn't last forever, but you are dropping one land per turn, so as long as you hit your land drop, this can be kept up for a few turns
Besides a receipt from when purchased, I cant find any documentation at all that might reflect todays value
If you control a Link-3 or higher "Marincess" monster, you can activate this card from your hand
Battle Phase : The turn player may choose to attack their opponent, using any monsters on their field that are in Attack Position
Know what's better than getting a powerful three-drop planeswalker to add to the canon of powerful three drops
When you go through thousands of battles, knowing to simply tap the yellow attack button is much simpler than searching for the word thunderbolt. The game also gives you far less information on basically everything, from moves to items, forcing you to experiment quite a bit