For Taunting Kobold, the card states, Whenever Taunting Kobold attacks, goad target creature an opponent controls. So, youd have to declare attackers on your turn to trigger the goad
They often have Colorless moves and abilities that make them useful in any deck, and often their attacks can get stronger based on the Energy you boost them up with, or your opponent's Energy
This eight-drop mythic rare in White may have a smaller 3/3 Indestructible body but makes on arrival and four turns of play not one, not two but
~ Machine washable (delicate mode with laundry net)
Another way to approach the same question is to calculate the average turn Ill get my fourth land
Sublime Archangel was a card that I had on my radar for some time