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Interestingly, that decks color identity also happens to be Jeskai, making it the perfect home for Gandalf

It is great for obtaining the cities blessing and that sort of thing

Once per your turn, when a Spell/Trap Card, or its effect, is activated (Quick Effect): You can negate the activation

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And they are highly prized by collectors due to their cultural significance

Creature - Artificer Dwarf Color tag templates(None) Fire Servant If a red instant or sorcery spell you control would deal damage, it deals double that damage instead