Theyre so generic that Ive been calling them snackpack cards since it was unknown exactly where they came from and someone in an old thread was saying from something similar to poptarts
The B-tier is probably the most interesting because of the uncertainty
Cards like Spirit Mascot and Owlin Historian, for example, grow whenever one or more cards leave your graveyard
Alistair, the Brigadier and Kate Stewart are both very similar
Reach the Horizon Rarity: Uncommon TYPE: Sorcery SUBTYPE: - CMC: 4 Mana cost: USD: $0.26 EUR: 0.13 TIX: 0.03 EDHREC RANK: 4590 Search your library for up to two basic land cards and/or Town cards with different names, put them onto the battlefield tapped, then shuffle
Chain Pain: Expressed more in their related cards Poison Chain and Paralyzing Chain, which can mill the opponent and inflict damage when you mill respectively