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The above picture is approximately to scale (may not be 100% exact) so should be a good example to judge

The Amber/Amethyst deck here relies a lot on abilities and being able to use certain characters in order to enact those abilities quickly and efficiently

if the card you eradicate has a flip effect, you banish copies of that card that exist in every player's deck

If your opponent adds a card from their deck to their hand outside of the Draw Phase and the Damage step, you can banish a random card from their hand

while also having a nice effect in some match-ups

It may have a little or a significant impact to you depending on different factors or variables