A classic card like Show and Tell says that each player may put an artifact, creature, enchantment, or land card from their hand onto the battlefield. In this case, after Show and Tell resolves, the cards just enter the battlefield naturally, so they dont use the stack and there cant be any response like a counterspell
This rule includes a player's own commander, which can deal combat damage to its owner if it is controlled by another player or if its combat damage gets redirected to its owner
Warping in and attacking with an Overlord of the Boilerbilges for three mana seems great
Whenever another nontoken creature you control enters, you may pay
With (spoiler alert!) the defeat of the Sea Witch, a battle that players could take on solo or co-operatively, the Disney Trading Card Games next set, Shimmering Skies, has a far more upbeat and celebratory tone