Then you can tap one with a mana to pump an Assembly Worker that is attacking by +2/+2
P/T Number 207a Language English Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (10/2/2025) An ability that triggers "whenever you waterbend" triggers whenever you pay a waterbend cost, regardless of how you paid that cost
While none of these lands are individually expensive, a fully Rossed out mana base could get a bit pricey
If one of these statements is true for you, and you dislike the Poison Counter mechanic in general, then these could be worth picking up
Its hard for the card to see 1v1 play, though, as its a slow 5-mana card, and if youre building around something, it should cost 1-2 at most