Goblin

Goblin is a defensive synergy through armor and health regeneration. Three heroes at 1 gold let you reach (3) in the first rounds: one random hero becomes noticeably sturdier and holds the front longer. (6) is only reached with the expensive heroes towards the end of the game, but it hands armor and regeneration to the whole board, which is especially valuable against physical damage. Early on, goblins are most often taken as a comfortable start that is later either completed to the full six or swapped for another build.