Goblin Ringleader
Creature — Goblin
Haste (This creature can attack and 
as soon as it comes under your control.)
When this creature enters, reveal the top four cards of your library. Put all Goblin cards revealed this way into your hand and the rest on the bottom of your library in any order.
Mark Romanoski
Rulings
If an effect refers to a “[subtype] spell” or “[subtype] card,” it refers only to a spell or card that has that subtype. For example, Goblin Gathering is a card that creates Goblins and features Goblins in its illustration, but it isn’t a Goblin card.
(wotc • 2019-07-12)
Rulings
If an effect refers to a “[subtype] spell” or “[subtype] card,” it refers only to a spell or card that has that subtype. For example, Goblin Gathering is a card that creates Goblins and features Goblins in its illustration, but it isn’t a Goblin card.
(wotc • 2019-07-12)