How do I add a link into the text of a card?

[Airtight Gaming]

I'm trying to add gifs for when our characters attack, for example, I want this to be shown in the card under the text: 

Instead of that, it shows the link only and not the gif.

[Michael Pryor · Accepted solution]

This should help:

https://help.trello.com/article/821-using-markdown-in-trello

See "Syntax that only works in card descriptions"