Eleven of these examples are graded CGC Pristine 10
R Rare Cagna, Malebranche of the Burning Abyss X DARK Level 3 [ FiendEffect ] ATK 1500 DEF 300 If you control a monster that is not a "Burning Abyss" monster, destroy this card
This Black & White: Emerging Powers - 3-Pack Blister (Pansage) contains

DeCard_KingShark - 3 weeks ago 883 0 Anime Decks $68.16 660 780 Solomon Muto Millennium Item Deck ygoprodeck.com/deck/the-millennium-deck-540015#/ MatthewOBrien - 1 month ago 568 0 Non-Meta Decks $108.64 570 900 Millennium Exodia Millennium Exodia GotGot - 1 month ago 1,198 0 Non-Meta Decks $105.00 450 1050 thunder K9 K9, Thunder dragon Obliviondarkness - 1 month ago 694 0 Non-Meta Decks $115.75 630 810 Exodia Exodia + Banish Polar Bear - 1 month ago 694 0 Non-Meta Decks $80.06 690 870 The Unstoppable Exodia Incarnate The Unstoppable Exodia Incarnate Helic - 1 month ago 799 0 Non-Meta Decks $37.06 630 150 Exodia Exodia rafamat - 1 month ago 568 0 Fun/Casual Decks $130.88 540 570 Atem Afterlife Deck King of Games All Things Geeky - 1 month ago 589 0 Fun/Casual Decks $140.36 960 420 Exodia Man Exodia, Man, Odion, Apophis, Set rotation Benso - 1 month ago 799 0 Master Duel Decks $105.27 720 900 EXODIA INCARNATE (FULL POWER MODE.) exodia incarnate miirakkk - 1 month ago 1,156 0

You could go the extra mile and attach literal tails to your cards, but Fluttershys ability likely refers to the card having a tail in the artwork
In the case of nonland cards you typically get cards that tap for less mana than you spent to cast them, or that you can't use right away thanks to summoning sickness