Though five mana to reanimate a creature is a rather steep cost, if you're able to fill your graveyard with mana-intensive Elementals, Horde Of Notions can allow you to flexibly cast splashy and game-winning cards when your opponents would least expect it.
The powerhouse card for The Tenth Doctor gives your nonland cards Suspend while also providing a way to dump mana into him to accelerate your suspended cards
Thats pretty much it
Otherwise, put it into your hand. Putting a card into your hand is nice, but you can literally win games by just combining Meren with Spore Frog, which you can sacrifice to prevent all combat damage for a turn - and only costs one mana
Some of the most famous options include the Latias & Latios GX and the multiple versions of Gengar & Mimikyu in the set
Nicol Bolas, the Ravager | Illustration by Svetlin Velinov In MTG, dragons are one of many creature types, but theyre among the most iconic