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In this scenario, the Stratagem Sky Shadow Sync is also in play. What exactly happens when you only have Sky Shadow (Tank) and Sky Shadow (Plane) as your last characters and both get KO'd at the same time?
If all your characters are KOed, and there is no other card text saying otherwise (like a head's deploy ability), you lose. Sky Shadow Sync doesn't include such text, so if Sky Shadow (Tank) and Sky Shadow (Plane) are your last characters and both get KO'd at the same time, you lose the game.
Source: Rules Roundup 2020-06-10
44🂠 25★ in deck and 10🂠 3★ in sideboard
Added by [Name Not Given]
Modified on Jan 6, '21
27 action cards
23 regular action cards
4 secret action cards
17 upgrade cards
11 weapon cards
3 armor cards
3 utility cards

4 icons on 4 cards (9%)

44 icons on 38 cards (86%)

4 icons on 4 cards (9%)

11 icons on 11 cards (25%)

10 icons on 10 cards (23%)

0 icons on 0 cards (0%)
40🂠 25★ in deck and 10🂠 10★ in sideboard
Added by Silverghst22
Modified on Dec 14, '20
20 action cards
19 regular action cards
1 secret action cards
20 upgrade cards
10 weapon cards
8 armor cards
2 utility cards

21 icons on 18 cards (45%)

4 icons on 4 cards (10%)

8 icons on 8 cards (20%)

9 icons on 9 cards (23%)

17 icons on 17 cards (43%)

0 icons on 0 cards (0%)
0🂠 15★ in deck and 0🂠 0★ in sideboard
Added by Racy
Modified on Oct 5, '20
None
Deck stats available once cards are in the deck
Battle stats available once there are at least 10 cards are in the deck