A deck that focuses on ramping up mana quickly, such as a green ramp deck, would benefit from using Explore as it allows for playing an additional land and drawing a card in the same turn, providing both card advantage and mana acceleration
You then choose another player, and then before you pay anything, that player can pay any amount of the generic mana cost of the spell
This transparency is great for learning about your card
Aboleth Spawn lets you copy an opponents Dockside Extortionist trigger, and because of Active-Player/Non-active-Player ordering, your trigger will then resolve first, so youre free to try and win in someone elses turn
Its now pretty scarce on TCGplayer and eBay
The generous warp cost pushes the card from casual playable into Vintage Cube staple territory