Basebuilding tool - 5x5 Water/Lava Blocking Sponges (OG-Style)

I'm not sure if this is practical to implement (I think it was easier to implement in older versions, there's also the concern of performance issues), but OG Factions players will likely appreciate this Most large servers in 2016 had this feature to my knowledge. If you place a sponge, it clears the 5x5 area around it (of both water & lava if i remember correctly, but it's been 10 years). Importantly, it also BLOCKS water from flowing into that area. The way sponges are typically used are placing them at the bottom of where you are genning walls with water/lava, and they prevent it from making a mess of blocks at the bottom. There are other ways to gen walls without it making a mess, but at least in my experience take longer and/or require more cleanup. Do keep in mind - you might have these sponges under an entire base. That could be a 13x13 chunk area if we assume 6 chunk buffer limit, and a 1 chunk base. So the performance impact is important to consider.