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Set: Siege I
Number: 031
Rare
1★
Tap one of your untapped Autobots. Add its

total to one of your untapped Autobots until end of turn.
If the Autobot I tap has any upgrades that increase its attack, do those bonuses count?
Yes. A character’s attack total equals its printed attack value plus any bonuses it’s getting from any other card.
Source: Wave 2 and 3 FAQ
If I Attack with Alpha Trion or Optimus Prime - Battlefield Legend and flip a Heroic Team-Up, can I use it to tap an untapped character of mine and have the Attack total added to Alpha Trion or Optimus? I would think so as the defense has yet to kick in and it is a playable action.
Heroic Team-Up can only increase the attack of an untapped Autobot. If Alpha Trion or OPBL attacked, it would be tapped by this point.
Source: Rules Roundup 2019-06-07
40🂠 27★ in deck and 0🂠 0★ in sideboard
Added by [Name Not Given]
Modified on Nov 29, '20
None
20 action cards
16 regular action cards
4 secret action cards
0 rolling action cards
20 upgrade cards
9 weapon cards
6 armor cards
5 utility cards
Wave 1: 13 cards
Wave 3: 8 cards
Wave 4: 16 cards
Wave 5: 5 cards

9 icons on 8 cards (20%)

17 icons on 15 cards (38%)

9 icons on 9 cards (23%)

3 icons on 3 cards (8%)

14 icons on 12 cards (30%)

2 icons on 2 cards (5%)