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The AI makes the classic rookie mistake when trying to kill a Tarmogoyf (e.g., it'll cast Shock on a 1/2 Tarmogoyf with no instants in the graveyard).

AI uses Disrupting Scepter even if dont have any cards in my hand but Copperhoof Vorrac on the field, but AI still should not activate that card when it doesnt have any effect.

AI never uses Oblivion Stone to destroy. It does however use it to add fate counters to lands and itself all of which do nothing in general.

AI does not take benefit of Gruul War Chant: creatures don't attack if a creature with defender + deathtouch (plant wall) is on the battlefield, even if it's the only creature (and is not able to block)

KrazyTheFox wrote:

If Demigod of Revenge is countered *before* its triggered ability resolves, the ability will still resolve. It will return that Demigod of Revenge from your graveyard to the battlefield, as well as any others. If you're casting a spell to counter Demigod of Revenge, it's important to clarify you're casting it *after* the triggered ability resolves if you don't want that Demigod of Revenge to be put onto the battlefield.

O_0 would not have wondered by myself! Thank you!

608 Resolving Spells and Abilities
608.2c The controller of the spell or ability follows its instructions in the order written.

Additionally, Serum Visions has only one ability, but that ability has two steps, which, again, must be resolved in the order in which they are printed.

True, alas. The card ruling is no more... :-/ (I saw it before Timeshift, though...)

Cinder Pyromancer doesn't always use its ability at its full effect (should tap before casting any red spell, but it does not most of time)

The AI (is you can call it that) is unable to play Eidolon of the Revel. As soon as it drops one, it continues merrily casting spells until it commits suicide.

In general, the 'illusion' effect (sacrifice if becomes a target of a spell/ability) is ignored, making these cards uncomfortably good in draft. For example, AI pings a 1/1 goblin token rather than a 3/3 skulking knight, even though the ping would kill either.

Reposting since I messed up where to post these "bugs".

1. Tolsimir Wolfblood keeps tapping for his legendary token

2. The AI uses Heroes' Podium activated ability without spending any mana for X.

3. The AI doesn't use Mardu Woe-Reaper's ability when the conditions allow it.

My Opponent (Iblis in Quest mode) blocked my 2/1 Wolf Pet with a 0/3 Wall of Roots. He then triggered the Wall of Root's ability so that it died, and didn't even use the mana for anything.

[edit] Oh, also: he was called 'Saqar' by the menu interface of the game but 'Iblis' during gameplay.

Here's another one, I don't know what caused it. Yes, it does happen more than once.

http://i.imgur.com/lfWaxDH.png

I was experimenting with another quest deck idea. At some point the AI just gives up casting spells even though there are enough mana to cast whatever's in its hand.

EDIT: Okay, it seems that once the AI hits the negatives, it will stop casting spells...or as soon as Transcendence hits the field.

EDIT: In a Phyrexian Unlife deck, the AI also stops casting spells once it hits negative.

AI plays a Winding Wurm with 5 mana in play. I cast Pendrell Flux on it. Next turn, he pays the 5 mana for the Winding Wurm's echo cost, even though it will die anyway to the Pendrell Flux because he has no mana to pay for that.

I've recently updated to [Forge Beta: 65-2015 ver 1.5.40] from an earlier version (1.5.18). Previously, whenever I have taken control of an AI's permanent with Memnarch, he has tapped it to prevent me receiving an untapped permanent (such as a land) and/or to receive a beneficial effect (such as tapping a Bloodline Keeper to put an extra Vampire into play). The AI no longer taps permanents it is losing control of in this way.

When deciding to Mulligan, the AI should make sure he actually has lands to play. I just played a game against Genghis Khan (Easy) and it looks like he kept a hand with a bunch of Lair lands that can't be played by themselves.

The AI only uses Reality Strobe to ping anything it considers a "big threat", which is a waste in a Paradox Haze deck and had all the opportunity to bounce the opponent's board.