For our purposes, a scry card is slightly more than just a card that has the scry mechanic

Facilier 39 $0.10 Elsa 40 $0.16 Elsa 41 $2.30 Elsa 42 $0.21 Flotsam 43 $0.23 Jafar 44 $0.05 Jafar 45 $0.05 Jetsam 46 $0.10 Magic Broom 47 $0.52 Maleficent 48 $0.10 Maleficent 49 $0.22 Marshmallow 50 $0.42 Mickey Mouse 51 $0.09 Olaf 52 $0.09 Pascal 53 $0.08 Rafiki 54 $0.06 Sven 55 $0.25 The Queen 56 $0.05 The Wardrobe 57 $0.09 Tinker Bell 58 $1.06 Ursula 59 $0.06 Yzma 60 $0.22 Zeus 61 $0.13 Befuddle 62 $0.06 Freeze 63 $0.14 Friends on the Other Side 64 $0.11 Reflection 65 $0.21 Magic Mirror 66 $0.11 Ursulas Cauldron 67 $0.25 White Rabbits Pocket Watch 68 $0.09 Aladdin 69 $1.29 Beast 70 $0.21 Cheshire Cat 71 $0.16 Cruella De Vil 72 $0.05 Duke of Weselton 73 $0.21 Flynn Rider 74 $0.17 Genie 75 $0.20 Genie 76 $0.10 Genie 77 $0.22 Hans 78 $0.05 Horace 79 $0.11 Iago 80 $0.05 Jasper 81 $1.60 John Silver 82 $0.08 Jumba Jookiba 83 $0.26 Kuzco 84 $0.19 Lady Tremaine 85 $0.13 Mad Hatter 86 $0.05 Megara 87 $0.20 Mickey Mouse 88 $0.12 Mickey Mouse 89 $0.22 Mother Gothel 90 $0.06 Peter Pan 91 $0.13 Tamatoa 92 $0.10 Tinker Bell 93 $0.19 Do It Again

This will tend to matter more for multi-color builds and tribes with big mana costs in multiple colors, so your options ARE narrowed somewhat, but over time more and more options will appear
It won't stop a creature from dying due to lethal damage or having 0 toughness, and it won't stop a permanent from being put into its owner's graveyard due to the "legend rule." None of these are sacrifices
Dragon Dragons embody raw power and spectacle on the battlefield, commanding fear and respect in equal measure
Beyond just being an auto-include within Hei Bai decks, the new Avatar Shrines have also made Go-Shintai more popular