Add Meteorite

Fixes #244

lib/magic/cards/meteorite.rb

@@ -0,0 +1,29 @@
+module Magic
+  module Cards
+    Meteorite = Artifact("Meteorite") do
+      cost generic: 5
+
+      enters_the_battlefield do
+        game.choices.add(Meteorite::Choice.new(source: source))
+      end
+    end
+
+    class Meteorite < Artifact
+      class Choice < Magic::Choice::Targeted
+        def choices
+          game.any_target
+        end
+
+        def resolve!(target:)
+          source.trigger_effect(:deal_damage, target:, damage: 2)
+        end
+      end
+
+      class ManaAbility < TapManaAbility
+        choices :all
+      end
+
+      def activated_abilities = [ManaAbility]
+    end
+  end
+end

lib/magic/tap_mana_ability.rb

@@ -1,5 +1,7 @@
 module Magic
   class TapManaAbility < ManaAbility
+    attr_reader :costs
+
     def initialize(**args)
       super(**args)
       @costs = [Costs::Tap.new(source)]

spec/cards/meteorite_spec.rb

@@ -0,0 +1,31 @@
+require "spec_helper"
+
+RSpec.describe Magic::Cards::Meteorite do
+  include_context "two player game"
+
+  let(:card) { Card("Meteorite") }
+
+  it "deals 2 damage to any target" do
+    cast_and_resolve(card: card)
+
+    choice = game.choices.last
+    expect(choice).to be_a(described_class::Choice)
+
+    game.resolve_choice!(target: p2)
+
+    expect(p2.life).to eq(18)
+  end
+
+  context "mana ability" do
+    subject { ResolvePermanent("Meteorite") }
+    let(:mana_ability) { subject.activated_abilities.first }
+
+    it "lets player choose which mana" do
+      p1.activate_mana_ability(ability: mana_ability) do
+        _1.choose(:green)
+      end
+
+      expect(p1.mana_pool[:green]).to eq(1)
+    end
+  end
+end