Its second ability makes a great mana dump in the latter half of EDH games: The conditional modified attacker stipulation is easy enough to satisfy, so 5 mana for a 5/5 flier is a great price
The Gold Saucer Coin flippers love flipping coins, so anything that has those fabled words on it is an immediate head-turner for Zndrsplt/Okaun fans
Heres how Id rate the 10 to start: Tier 1 Archetypes (best decks) UR Big Spells BG Graveyard/Midrange Tier 2 Archetypes (good) Tier 3 Archetypes (decent) UB Control/Good Stuff GW Go Wide/Midrange BR Wizards/Bleeder RG Landfall/Stompy The main delineation between these archetypes is the level of synergy and support they have
On its own, it gives you and your permanents hexproof until end of turn, which is already solid
Turning a late-game land into a creature is useful, and I like that you still get the land from exile if you cast the adventure first, which is something you dont get from MDFCs
This Dragon resists removal with hexproof if it's untapped, and it generates value with its Anticipate effect after dealing combat damage to players