
Artifact // Land — Cave
Whenever this artifact or another artifact you control enters, up to one target creature you control gets +1/+0 and gains haste until end of turn. Then transform this artifact if you control four or more artifacts.
(Transforms from Dowsing Device.)
: Add
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: Until end of turn, target creature gains haste and gets +X/+0, where X is the number of artifacts you control. Activate only as a sorcery.
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The value of X for Geode Grotto's last ability is determined only as it resolves. Once that happens, the value of X won't change later in the turn even if the number of artifacts you control changes.