Tactical Planning

With enough preparation and a good team, the word impossible seems less... necessary in one's vocabulary.

Before an encounter of any kind, you can spend one minute devising a plan to deal with the situation. As it requires preparation beforehand, this feat becomes inaccesible during an enemy ambush, or if the situation cannot be prepared for.

After crafting the plan, make an Intelligence check with a DC of 10 plus the higher modifier between Intelligence and Wisdom, to a maximum of 15 (even if the modifier you choose is higher).

Upon success, you and all involved allies gain advantage on attack rolls, saves, and ability checks (including skills) for a number of rounds equal to 1 + INT modifier + (Level ÷ 2), rounded down.