Ticking Gnomes
Artifact Creature — Gnome
Oracle Text
Echo
(At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
Sacrifice this creature: It deals 1 damage to any target.
Rules for this card
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A keyword ability that imposes a cost to keep a permanent on the battlefield. See rule 702.30, “Echo.”