4 new cards from Weatherlight (WTH) set (Circling Vultures, Liege of the Hollows, Sawtooth Ogre, Thran Tome);
New game modes
Tournament: Jumpstart Elimination;
Tournament: Jumpstart Swiss;
Cube: July 2020 Vintage Cube;
Other
Images: fixed wrong images for some tokens (Angel, Beast, Bird, Cat, etc);
AI: fixed that computer can cancel "target player or planeswalker" spells on bad effects (can't choose himself);
AI: fixed that AI and other players can play cards without additional cost in some use cases (#6760);
AI: fixed that it can't play cards affected by cost modification without full mana available (#6698);
AI: fixed that computer can't play some cards correctly (Ad Nauseam, Crazed Firecat, Fiery Gambit);
Game: fixed that in Oathbreaker format signature spell didn't return to command zone in some cases (#6695);
Game: fixed that in Oathbreaker format game freezes on start up (#6695);
Game: fixed game freeze on mulligan phase and disconnected player;
Game: fixed that creatures can get +1/+1 when user cancel the cast of a spell (#6618);
Game: fixed that launcher script for unix system can be broken in some systems (line ending problem, see #6812);
GUI: improved game logs, now they must shown target hints for selected targets (if it have that hints);
GUI: increased default window size for pick choice dialog, window size can be changeable by the user;
GUI: added a button on the deck editor to change your cards to the oldest versions (#6522);
GUI: fixed auto-generated names for AI in new tournament dialog;
Abilities fixes
Cost modification - fixed that affected cards can't be played without full mana available (#6698);
Modal abilities - fixed that target choices and resolves goes in user selected order instead card printed order (#6771);
Amplify - fixed that it allows reveal itself when put onto battlefield from hand (#6776);
Artifact you control effects - added card hints;
Blocks or becomes blocked - fixed that some cards triggers only for creatures (example: Brushwagg, see #6660);
Card hints - added hints to Avatar of Might, Avatar of Will, Avatar of Woe, Dusk Feaster, Rekindled Flame;
Card types in graveyard - fixed wrong card type count in some cases with copies (example: Delirium, see #6704);
Copy face down permanent - fixed that cloning a face-down permanent doesn't produce a plain 2/2 creature (#3582);
Enters under control of opponent - fixed that permanents can be kept even after controller left the game (example: Captive Audience, see #5593);
Exile and return to battlefield - fixed that some cards can return commander from command zone but they shouldn't (example: Cloudshift, Conjurer's Closet, see #5151, #5278);
Goaded - fixed that creatures can illegally attacking planeswalker controlled by another player (#6781);
Monstrous - added card hint (#6765);
Morph ability - fixed that card with morph ability marked as playable all the time (#6680);
Offering - fixed that cost reduction doesn't work from command zone (#4909);
Put face up ability (Morph) - fixed double text (#6663);
Search library and/or graveyard and put in hand - fixed that it shuffle library before card move;
Special actions - fixed that it can be prevented by effects, fixed Companion rollback error (#6753, #6747);
Special mana payments like convoke/delve - fixed that it can't be used to cast card from command zone (example: Tasigur, the Golden Fang, see #6680);
This spell costs less to cast - added card hints for some cards;
Void effect - improved GUI dialog to enter numbers instead select (#6673, #6716);
Cards fixes
Aetherflux Resovoir - added card hint;
Agyrem Plane - fixed that the effect was not applied to creatures of all players (#6486);
Arcane Artisan - fixed that the tokens were not exiled but destroyed (#6710);
Aven Mimeomancer - fixed that P/T setting persists after target zone change (#6782);
Benthic Explorers' - fixed that ability is not being treated as a mana ability (#6714);
Black Mana Battery and other Battery cards - fixed that it adds Storage counters instead Charge (#6787);
Bolas's Citadel - fixed that opponent can use Bolas's play ability for own cards (#6741);
Canopy Stalker - fixed must be blocked ability (#6783);
Chainer, Nightmare Adept - fixed that trigger ability doesn't work in commander (#6578);
Chainer, Nightmare Adept - now will gain haste when it enters the battlefield;
Chevill, Bane of Monsters - fixed that it not triggering off of planeswalkers dying;