You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <allimages>
      <img name="Amduscias_m.gif" timestamp="2020-01-23T05:23:19Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/0/0e/Amduscias_m.gif" descriptionurl="http://www.fantasicawiki.com/wiki/File:Amduscias_m.gif" ns="6" title="File:Amduscias m.gif" />
      <img name="Oriens_m.gif" timestamp="2020-01-23T05:22:21Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/b/bc/Oriens_m.gif" descriptionurl="http://www.fantasicawiki.com/wiki/File:Oriens_m.gif" ns="6" title="File:Oriens m.gif" />
      <img name="Terpsichore_11_mlb_card_back.jpg" timestamp="2019-03-20T05:08:05Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/1/15/Terpsichore_11_mlb_card_back.jpg" descriptionurl="http://www.fantasicawiki.com/wiki/File:Terpsichore_11_mlb_card_back.jpg" ns="6" title="File:Terpsichore 11 mlb card back.jpg" />
      <img name="Terpsichore_11_card_back.jpg" timestamp="2019-03-20T05:07:57Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/0/09/Terpsichore_11_card_back.jpg" descriptionurl="http://www.fantasicawiki.com/wiki/File:Terpsichore_11_card_back.jpg" ns="6" title="File:Terpsichore 11 card back.jpg" />
      <img name="Empty_icon.png" timestamp="2019-03-20T02:10:25Z" user="Kittylitter" url="http://www.fantasicawiki.com/w/images/b/bd/Empty_icon.png" descriptionurl="http://www.fantasicawiki.com/wiki/File:Empty_icon.png" ns="6" title="File:Empty icon.png" />
      <img name="Heroic_Packs_42_banner.png" timestamp="2019-03-19T03:43:51Z" user="Kattiara" url="http://www.fantasicawiki.com/w/images/a/ab/Heroic_Packs_42_banner.png" descriptionurl="http://www.fantasicawiki.com/wiki/File:Heroic_Packs_42_banner.png" ns="6" title="File:Heroic Packs 42 banner.png" />
      <img name="Ogenus_card_back.jpg" timestamp="2019-03-17T15:35:13Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/3/34/Ogenus_card_back.jpg" descriptionurl="http://www.fantasicawiki.com/wiki/File:Ogenus_card_back.jpg" ns="6" title="File:Ogenus card back.jpg" />
      <img name="Garundas_card_back.jpg" timestamp="2019-03-17T14:54:42Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/9/9f/Garundas_card_back.jpg" descriptionurl="http://www.fantasicawiki.com/wiki/File:Garundas_card_back.jpg" ns="6" title="File:Garundas card back.jpg" />
      <img name="Yagami_Meru_card_back.jpg" timestamp="2019-03-17T14:27:09Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/1/1c/Yagami_Meru_card_back.jpg" descriptionurl="http://www.fantasicawiki.com/wiki/File:Yagami_Meru_card_back.jpg" ns="6" title="File:Yagami Meru card back.jpg" />
      <img name="Taira_mlb_card_back.jpg" timestamp="2019-03-17T14:27:01Z" user="Jarrbox" url="http://www.fantasicawiki.com/w/images/0/03/Taira_mlb_card_back.jpg" descriptionurl="http://www.fantasicawiki.com/wiki/File:Taira_mlb_card_back.jpg" ns="6" title="File:Taira mlb card back.jpg" />
    </allimages>
  </query>
  <query-continue>
    <allimages aistart="2019-03-17T14:26:53Z" />
  </query-continue>
</api>