Skilled Brown Magician

Each time a Spell Card is activated, place 1 Spell Counter on this card when that Spell resolves (max. 3). You can remove 1 Spell Counter from this card, then activate 1 of these effects;
• This card gains 1500 ATK, and its Level is increased by 1.
• Add 1 "Kuriboh" monster or 1 "Multiply" from your Deck or GY to your hand.
You can only use this effect of "Skilled Brown Magician" once per turn.