>>544583821
Base power is the roll a skill has before any coins land, meaning you start with 21 power then add the coin power based on heads or tails (+12 in this case)
The number of coins is how many coins the skill rolls
The offense level is kinda odd but it just boils down to +1 clash power for each 3 offense level above the skill you're clashing against (also gains 1% damage for every 3 offense over defenders defense)
attack weight means how many slots a skill will target, not enemies(though it usually is that simple) but skill slots, like how you clash specific skills, but the attack weight adds more dotted lines that go to free slots available on field, aggro (when a skill has caution tape) makes skills soak up more attack weight