In the most combo builds of goblins you just want exactly the right goblin and so you are willing to play the weak Goblin Matron every now and again
Black Cat, Cunning Thief might cost an extra mana, but thats worthwhile for a far stronger enters ability
Overall, this deck is built to be fun to play, is well-balanced so as not to rely on its Commander too much, and is highly upgradable with just about any budget
If the spell has any mandatory additional costs those must be paid to cast the spell
Whats interesting about this card is the fact that although an English-only promotional reprint of it was later released as part of the Kommo-o-GX box, that promotional version which was one of the SM Black Star Promos didnt match the value or general desirability of this card
This means that your opponents will not be able to cast your best spell for free, and you will still be allowed to keep five of the six cards you've drawn