Let me know in the comments below or over in the Draftsim Discord
Getting to put a dragon into play for free from your library is usually a 5- to 7-mana advantage, and red has many ways to give Ureni haste so you can trigger it twice in a turn
A great new mechanic could be a free way to exile the card in question to replace your next draw with a basic land, like land cycling but without getting to draw the card
Surgical Extraction Surgical Extraction is the most over-sideboarded card in Magic
Let's not overcomplicate things, if you have two dragons, and they both get indestructible and grow each turn, isn't that worth 5 mana
While a ton of them can't (or won't) be cast outside of the kitchen table (I'm looking at you, Polar Kraken), they're just such iconic, larger-than-life creatures