Note that they may award your opponent more than 1 Prize Card when theyre Knocked Out, however, so using them can be risky as well as rewarding
At lower rarities, there are cards like Attentive Skywarden and Elvish Vatkeeper, which do it by dealing combat damage
However, Urzas Saga provided its own spin on this rare subgroup of cards with a 0/1 creature that cant be targeted by spells or abilities (from any player, even its owner) due to containing the increasingly hard-to-find shroud keyword
This simple little card has greatly risen in my estimations over the past couple of years
It has powerful abilities and effects, capable of guiding the tactical direction of the deck
If Exchange of Words has lost its own abilities (or perhaps its text box), the effect will still only end once it is no longer on the battlefield