Modern Horizons 3 has a bonus sheet full of these, and two were shown off at MagicCon Chicago: Laelia, the Blade Reforged and Priest of Titania
Each foe mills 2 cards and you can exile an enchantment, instant or sorcery in their graveyard under the 2nd spell's cost and cast it for free
Plains Rarity: Common TYPE: Basic Land SUBTYPE: Plains CMC: 0 Mana cost: USD: $0.23 EUR: 0.12 TIX: 0.03 EDHREC RANK: - ( : Add .) Plains Rarity: Common TYPE: Basic Land SUBTYPE: Plains CMC: 0 Mana cost: USD: $0.81 EUR: 0.80 TIX: 0.00 EDHREC RANK: - ( : Add .) Plains Rarity: Common TYPE: Basic Land SUBTYPE: Plains CMC: 0 Mana cost: USD: $0.25 EUR: 0.83 TIX: 0.03 EDHREC RANK: - ( : Add .) Plains Rarity: Common TYPE: Basic Land SUBTYPE: Plains CMC: 0 Mana cost: USD: $0.21 EUR: 0.12 TIX: 0.03 EDHREC RANK: - ( : Add .) Poison the Waters Rarity: Uncommon TYPE: Sorcery SUBTYPE: - CMC: 2 Mana cost: USD: $0.17 EUR: 0.10 TIX: 0.03 EDHREC RANK: 13273 Choose one All creatures get -1/-1 until end of turn
Im only bringing this up to establish my bona fides
3 cards Full Sleeves: The Tattoo Pack 5 cards The Godzilla Lands 5 cards April Fools 5 cards Thalia - Beyond the Helvault 4 cards International Women's Day 5 cards Theros Stargazing, Volume V 3 cards Theros Stargazing, Volume IV 3 cards Theros Stargazing, Volume III 3 cards Theros Stargazing, Volume II 3 cards Theros Stargazing, Volume I 3 cards Year of the Rat 4 cards OMG KITTIES
Plus, decks that synergize with allies will appreciate the extra reinforcements this card provides
