Event #231678078
It appears Weather the Storm considers buyback costs an additional spell, not the cost of an existing spell, like Sprout Swarm. In Turn 11, at 11:07 AM EST of the Event, the observer can see the only two spells cast that turn were Sprout Swarm with buyback, and Weather the Storm. This would give a Storm Count of 2, gaining my opponent 3 times 2 Storm Count = 6, not 9 life. I think this is an error.

Casting Peer into the Abyss on yourself with Teferi's Tutelage out in play crashes the MTGO game client if you mill beyond your opponents library

While selecting cards with Doomsday, the opponent can see any cards you're choosing from the graveyard, as they have the green selection outline around them. This leaks information, as Doomsday does not reveal the cards selected, and unless you know your opponent's exact decklist, it cannot be determined from the exiled cards whether or not a given card was chosen.

Steps to reproduce:

Player B puts some cards in graveyard
Player B casts Doomsday
Player B selects some cards from their graveyard
Player A observes that they can see a green outline appear around cards as they are chosen

I cast fire prophecy and wanted to copy it with lutri and it resolved without giving me a chance

Mutate porcuparrot
Tap it to deal damage
Damage dealt is not correct

I lost a round of limited due to porcuparrot being bugged. The creature was mutated two times but when tapped was dealing 4 damage.

Lurrus does not trigger companion with expansion//explosion in the deck. Steps are:
1. Create a deck full of lands and 1 expansion//explosion with lurrus in the sideboard
2. Enter a game
3. Actual: Game resolves mulligans and turns start
4. Expected: Companion should trigger and allow the player to select a companion.

My opponent equiped skullclamp on his wandering fumarole, then we he switched the power and toughness of wandering fumarole it became a 3/2 instead of dying.

During my matches. I could not board cards in which caused me to lose

After being targeted by Merfolk Trickster's ETB effect, Ghitu Lavarunner's power does not shrink to 1. This happened to me twice in this game and resulted in two very bad blocks I was forced to make.

I've made this particular play many times, especially on Arena, and unless I am misremembering terribly, it resulted in the Trickster being able to profitably block and kill the Lavarunner.

I am open to being wrong because layers are complex, but I was 99.9% sure the Lavarunner should've shrunk.

doesnt let me use the ability of fiend artisan no matter how many mana i tap. my timing of the ability is correct but doesnt show the "done" button.

I had Blade of selves equipped to Mycoloth, and on the battle field were roughly 70 saproling tokens that had all been generated by the equipped Mycoloth. Once combat was over the Myriad exile effect took place. Rather than exiling just the Mycoloth token, it also took with it all 60 attacking tokens and the 10 defenders I left up resulting in a loss that should have easily been a win on my next turn.

Match #231578755 Game #729720174 time, maybe around 30mins?

1. Archdemon of Unx's Ability is triggered. 2.Triggered Ability is resolved. 3.Actual:It create SWAMP zombie token. 4.Expected:It create zombie token.

Jegantha in the sideboard of a deck (modern tron) that meets the companion requirement (No card in the starting deck has more than one of the same mana symbol). Magic Online says the deck doesn't meet the requirement until I remove the 1 main deck Walking Ballista, at which point, Jegantha is highlighted blue to indicate that it is a valid companion.

Unable to activate arbor elf during combat phase, so unable to pay Ghostly Prison cost.

Hello

Situation:
Commander game, I have my commander (Polukranos, Unchained) in my graveyard. I checked the zone-change settings, I have "Command zone, instead of library" selected.

My opponent casts the Aftermath-half of Commit/Memory which says:
"Each player shuffles their hand and graveyard into their library, then draws seven cards."

What should happen:
Polukranos goes to command zone. I draw 7 cards.

What happened:
Polukranos went to my library, I drew 7 cards, one of which was Polukranos .

Check out the attached, this happens to me too often. I have other screen shots as well. Ran it through a hypergeometric calculator. Feel free to do the same. 0.000028712 are the odds. About the same as winning a high stakes lotto. Please fix.

Had a hexproof 3/6 (Wingfold Pteron) that had 3 mutates on it, at the end of my op's Turn I flashed mutate a pouncing shoreshark onto the bird, drew a card for Dreamtail, targeted Luris with bounce and fetched a swamp for Greathorn, and this interaction killed my creature

sakashima in play copying a creature and being target by oko from the oponnent
When this happened MTGO made me choose a Sakashima to keep and even though I tried to click the creatures several times it didnt let me continue or cancel.