Like idatog wrote, this is very good manafixer in a RGB LD-deck.
Posted By:
tavaritz
(11/16/2011 6:48:26 AM)
This card gets way too bad of a rep. In multicolored green / blue/ red, where early play is the key to midgame setup, this card plays brilliantly. It plays the earlygame variance to run ANY mana near-guaranteed on the first turn.
Run with 4 Llanowar Elves and a few Joiner Adepts (or abundant growth), Gitaxian probe, Lightning bolt, and all of a sudden you have three color splash with one card, and your enemy can do nothing about it.
5/5 earlygame, and when you can successfully run EG red / green / blue, the rest doesn't matter
Posted By:
EnPassant
(8/19/2012 2:49:51 PM)
This is a terrible card.
Everyone knows Rishadan Port? You know, the card that was one of the worst things about Mercadian Block? What this card does is basically turn any land of your opponents into a Rishadan Port except even better, since all they do is pay 1 to make this not produce mana, while Port required 1 and tapping the port itself (so 2 mana).
Posted By:
mdakw576
(1/6/2014 6:08:42 PM)
This is conditionally rather good. Most players will be trying to use all of their mana every turn out of a need for efficiency. The drawback can be huge when you really need that one mana though.
It could be cute in a deck with Mana Leaks and Force Spikes though. Try and tap it for blue mana when they have one left, and when they deny you, Spike their spell!
Posted By:
Kryptnyt
(6/8/2011 5:09:20 PM)
This card is not as bad as it seems at first glance: in a control deck you can force opponent to use his/her mana to prevent you casting your spells; moreover it gives you ANY color of mana, so that you can cheat about your colored mana needs (for example, you ask for green and you don't have any other green mana, opponent pays 
to prevent you have this mana, but you cast another nongreen spell and opponent can't cast his/her counter anymore because he/she doesn't have enough mana). I think this is the intent this card was designed to. It's not Reflecting Pool or City of Brass, but it doesn't pretend to be!
Last thing: GREAT ARTWORK! Rob Alexander rulez!
Posted By:
Paolino
(2/27/2012 3:03:58 AM)
-This card works differently from other »variable RHYSTIC»: it is the only one having you announce your choice FIRST (color) and THEN opponents get to pay or not.
-This represents strategic information.
-With the other «variable RHYSTIC» (Mystic Remora, Rhystic Circle, Rhystic Study), opponents decide whether or not to pay FIRST, and THEN you make your decision.
-(«Non-variable RHYSTIC» include no hidden choice.)
Posted By:
Chaikov
(2/4/2010 10:06:49 AM)
No, the rules on the card overrule the actual game rules, so they can react to it.
Posted By:
Keino
(10/3/2009 3:01:20 PM)
Way too unreliable to stick into any deck. Especially bad in multiplayer.
Posted By:
Lord_Ascapelion
(2/13/2010 10:23:02 PM)
Beautiful art, terrible card.
Posted By:
Nagoragama
(8/23/2010 6:42:07 PM)
I play it in my land hate decks for the ultimate insult-
"I tap Rhystic Cave for a {R}, do you respond?"
"You killed all of my lands except this plains and it's tapped."
"Cool! {R} for me, I cast Raze on your tapped Plains (sacrificing Rhystic Cave)"
Posted By:
Ideatog
(9/5/2011 9:55:06 PM)