fix: Fill blank pages which didn't get copied correctly

books/core/78.html

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-While the explanation for the Objective action on
-<a href="/books/core/#page-72">page 72</a> should give a pretty While the
-explanation for the Objective action on
-<a href="/books/core/#page-72">page 72</a> should give a pretty
+<h2>SAMPLE GOAL CLOCKS</h2>
+<p>
+  While the explanation for the Objective action on page 72 should give a pretty
+  good idea of how it should be used, below are examples of creative strategies
+  that can be used during conflicts.
+</p>
+<p>
+  When adjudicating whether the active character is performing an Attribute
+  Check against a set Difficulty Level or an Opposed Check against another
+  character that is present on the scene, remember that there is no limit to how
+  many times a character may oppose a Objective action within the same round.
+</p>
+<p>
+  A single defender with high Attributes can still prove challenging even when
+  severely outnumbered.
+</p>
+<h3>BRING IT DOWN</h3>
+<p>
+  While fighting against a winged dragon, the heroes decide to work together to
+  keep it permanently on the ground and within reach of melee weapons.
+</p>
+<p>
+  This is a major goal since it will make the battle much easier but will not
+  end it by itself. The Clock should probably have 6 sections. Possible actions
+  would be...
+</p>
+
+<ul>
+  <li>
+    Use【 DEX + WLP】 to bravely taunt and lure the dragon near the ground,
+    striking when it's nearby. You will surely gain a +2 bonus if you are
+    carrying something the dragon desires!
+  </li>
+
+  <li>
+    If armed with a ranged weapon, use【 DEX + INS】 to aim at a wing and wound
+    the muscles governing its movements.
+  </li>
+
+  <li>
+    Use【 INS + WLP】 to help your group retreat towards a narrow canyon where
+    the dragon will have trouble maneuvering.
+  </li>
+
+  <li>
+    If the dragon is temporarily within reach, such as after someone attempted
+    the first approach on this list, use【 MIG + MIG】 to wrestle it and pin it
+    down! Most of these Checks will be performed against the dragon's own
+    Checks, but the Game Master might also decide that the second approach must
+    be made against the dragon's Defense score.
+  </li>
+</ul>
+<p>
+  Most of these Checks will be performed against the dragon's own Checks, but
+  the Game Master might also decide that the second approach must be made
+  against the dragon's Defense score.
+</p>