The top two lines of text allow us to know what card we will draw next to adjust our strategy accordingly and we are able to cast goblin cards from the top of our deck which can give us enourmous card advantage over an opponent
You can use the alternative ability Dune Chanter gives those Deserts to tap them without losing life
The RRR required to cast Goblin Chainwhirler effectively demands 22 unique red sources to cast it on time, but without Rakdos or Gruul providing the requisite untapped sources of red plus green or black, being able to get this combo online in a timely fashion isnt exactly reliable
5 promo cards, including Chinese version of popular English SWSH020 Pikachu promo, Grookey, Sobble, Scorbunny, and Cinderace
They're also generally harder to counter given that you're activating them as abilities rather than casting their channel effects as spells
The chapter III ability will then trigger