In order to push back against the reliance on two mana rocks with a disadvantage like Charcoal Diamond that are heavily played, WOTC has been printing powerful three mana rocks like this pair that tap for any color of mana and then add powerful extras like Decanter of Endless Water
This mechanic was meant to mirror gambling-style stakes, but it quickly became controversial and was banned from all official formats by 1996
The other thing to note here is that the power level of this instant is directly tied into the speed of the EOE Limited format
Merry, Warden of Isengard + Pippin, Warden of Isengard I kind of like the go-wide stuff happening with the Merry, Warden of Isengard and Pippin, Warden of Isengard version of the Food and Fellowship Commander precon, but neither really convinces me
Pack of cards may vary
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