Its worth sacrificing an important creature on your board if you think the enemys board is getting out of control and might prove to make your life harder in the next turns by defending with multiple units to get rid of an enemy
These decks can function on just a few sources of mana and want to draw the bare minimum number of lands needed to cast a few cheap spells each turn
The player can simply say goodbye to unwanted bulk cards and ponder what they might be recycled into someday
Amber is all about healing and support (literally, in the case of the Support keyword)
On turn 6, you use her one more time, putting her in the graveyard- and hey, its turn 6, you can Escape her right away
Sure, its a lot harder to cast, but no ones going to play this outside of very specific decks