Banish 1 Fiend monster or Archfiend card from your hand or GY
But that's just the outlook in conventional Magic, where countering something is synonymous with rendering it ineffective
Regarding which deck to mill with Tearlaments Kashtira, it is generally better to mill your own, as they might recover Fenrir from the GY with Birth
Edge of Eternities is available for preorder now from your local game store, online retailers like Amazon, and elsewhere Magic products are sold.
If you do prefer a binder with removable pages (for the flexibility of adding pages or rearranging), consider using a D-ring binder instead of the common round (O-ring) binder
Trading card games (TCG) or collectible card games (CCG) work similarly to sports cardsyou buy, sell, and trade them to grow a collection