At the end of that exchange youll have traded away your two worst cards for two, usually better, cards
Its important to consider which doubler to include and ask yourself a few questions to figure it out
the former earn you coins you can then use on boosters, while the latter can be used to create or clone cards to fill a deck rather than chancing it with booster packs
Thats not to say the current card design philosophy is bad: this method of assembling a deck was way harder, and took way more time, than brewing a Commander deck using modern cards and modern commanders
Illustrated by: Desmuncubic Not Legal Traditional Standard Not Legal Traditional Alchemy Not Legal Traditional Explorer Not Legal Traditional Historic Not Legal Traditional Timeless Rulings 2004-10-04 The timestamp for the "in your graveyard" ability is set at the time that this card goes to your graveyard, regardless of whether you control a Mountain at that time.
Aside from the cards you play, and the modal cards that appear in sets - which are just cards with multiple modes of casting - its hard to get a feel for that in Magic: The Gathering