First strike
When Goblin Chainwhirler enters the battlefield, it deals 1 damage to each opponent and each creature and planeswalker they control.
If the damage Goblin Chainwhirler would deal to a player is prevented, it still deals 1 damage to that player’s creatures and planeswalkers.
In a Two-Headed Giant game, the Goblin Chainwhirler’s last ability causes the opposing team to lose 2 life.