ゴブリンが１体だけなんてあり得ない。

巣穴からの総出

赤の１/１のゴブリン・クリーチャー・トークンを２体生成する。
ストーム（あなたがこの呪文を唱えたとき、このターンにこれより前に唱えられた呪文１つにつきこれを１回コピーする。）

Empty the Warrens

Create two 1/1 red Goblin creature tokens.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

The List

Kicking the warren
—Argivian expression meaning "causing trouble"

Dominaria Remastered

Time Spiral Remastered

Duel Decks: Mind vs. Might

A copy of a spell can be countered like any other spell, but it must be countered individually. Countering a spell with storm won't affect the copies.

Spells cast from zones other than a player's hand and spells that were countered are counted by the storm ability.

The copies are put directly onto the stack. They aren't cast and won't be counted by other spells with storm cast later in the turn.

The triggered ability that creates the copies can itself be countered by anything that can counter a triggered ability. If it is countered, no copies will be put onto the stack.