AI cheating on Guardian of the Great Door.

**Describe the bug**
Wheenn the AI plays Guardian of the Great door, the text says "As an additional Cost, Tap 4 Untapped Artifacts, creatures, and/or lands you control.

It will tap only two, as it counts the two it tapped to pay the cost as part of it.

**To Reproduce**
Get against the Angelic Paige in Adventure mode, and wait for it to play it, especially if early in the round.

**Expected behavior**
It should need to tap four additionnal, as you can seee in the screenshot, It only tapped two lands, an artifact equipped to one of its creatures, which is enchanted with faiths fetters, and then another land. So it only tapped four things, when it should of technically also tapped the angel and the last remaining land,

**Screenshots**