"karmatic retribution" (KR) is an effect applied by some of sans' attacks that has the following effects:

If the target is any "good" alignment, KR has no effect.

If the target is any "neutral" alignment, Next turn, deal the same amount of damage the attack did as psychic damage.

If the target is any "good" alignment, Next turn, deal double (2x) the damage the attack did as psychic damage.

You can summon bones to deal damage. How many bones is dictated by a d8 roll. Each bone deals 1d6 damage and applys "karmatic retribution" (KR). these bones attack the SOUL, and therefore are ineffective to enemy's with no SOUL, however if the target has a SOUL and no defense for it, AC checks need only half the target AC to pass. If sans is in his "exhausted" state, the number of bones is a d4 instead.

"blue magic" has two (3) effects:

1: sans can make any of his attacks a reaction to an enemy moving in sight, causing the enemy to roll a d20 with a DC of 10. If failed, use the damage of the attack, and add 1d6.

2: sans can cast blue magic on a target, allowing sans to pick a direction and set the targets gravity to that direction.

3: sans can use blue magic to fly with a speed of 15 ft

sans can cast "gaster blaster" as an action dealing 2d6+4 damage to all enemys in a 45 ft line. This attack also causes "karmatic retribution" (KR)

sans can drink ketchup as a bonus action giving him 2 extra actions. This can be used once every 2 rounds or given to someone else.

instead of moving, sans can teleport to a location within 60ft of himself and bring one person making contact with him along. sans can also use an action to do this.

sans can break the 4th wall and communicate directly with the players and dm, hear anything the dm or players say, and also see the board.