These are often designed as game-smoothers for fighting mana flood in Limited, allowing you to replace your 17 th land with a card that can be mana if needed but also serves as a better topdeck on turns 7 and beyond
There are many cool things you can do in an Agatha deck, and if you want to read more, I did a deep dive you can find below
Some have been omitted simply because they werent pulled from the booster packs, such as Underworld Dreams, Takklemaggot, Mana Drain, Land Tax, and Undertow
1 token, ad card, or card not included in the set Recommended for: Players who enjoy the experience of opening booster packs and/or the thematic resonance of a set The newest booster pack to join the selection are Set Boosters, debuting with the release of Zendikar Rising