This ability triggers only once each turn." This ability isn't tied to any permanent
Looking into it ever so slightly more, I found Pokemon Trading Card Game Live (lovingly called Pokemon TCG Live or PTCGL by the community), and a new obsession grabbed me faster than a Master Ball
Youll get to fix your next draw and possibly draw an extra card, and theres never an actual risk that Gollum dies to a blocker
Enchantment - Class Color tag templates(None) Rhystic Study Whenever an opponent casts a spell, you may draw a card unless that player pays
Lets see what were dealing with this time around: Chalice of the Void: $68 Crucible of Worlds: $60 Celestial Colonnade: $55 Dark Confidant: $50 Doubling Season: $50 Scapeshift: $50 Asuza, Lost But Seeking: $45 Engineered Explosives: $42 Goryos Vengeance: $40 Through the Breach: $40 Bitterblossom: $30 Collective Brutality: $24 Thalia, Guardian of Thraben: $20 Creeping Tar Pit: $20 Gaddock Teeg: $20 Meddling Mage: $20 Kolaghans Command: $20 Glen Elendra Archmage: $16 Collected Company: $14 Raging Ravine: $12 Birds of Paradise: $6 Avenger of Zendikar: $5 Wrath of God: $3 Lavaclaw Reaches: $2 Furnace of Rath: $2 Stirring Wildwood: $1 Relentless Assault: $1 There are several cards on this list that are both important within the history of the game and and are also in need of a reprint
"Dragon Ravine" is so good since it's a soft once per Turn, meaning if another copy goes onto the Field the effect can be used again