Even if you only get a single use out of a Chromatic Lantern or Fellwar Stone, that still means you were able to spend mana ahead of your expected curve
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While I'm not sure it's possible for Wizards to reprint away the counterfeit card problem (but more on this in a minute), finally doing some things we've been talking about for a while would certainly help to alleviate some of the pressure
Blastoise & Piplup GX #38Ultra Rare $80.07 Sunflora #8Rare $0.38 Spheal - 49/236 #49Common $0.24 Slugma #26Common $0.21 Phione #57Rare $0.40 Charizard & Braixen GX #22Ultra Rare $38.88 Snorunt #47Common $0.23 Tepig #31Common $0.32 Rapidash #24Uncommon $0.27 Decidueye #20Holo Rare $1.10
Regardless, these enchantments are all relatively easy to trigger for green, since it cares about big creatures, are cheap to buy, and require a moderate investment of mana
Legendary Planeswalker - Bolas Ugin, the Spirit Dragon +2: Ugin deals 3 damage to any target