ジェイド・オーブ・オヴ・ドラゴンカインド (Jade Orb of Dragonkind) (ja)
Artifact
(CMC 3)
: Add . When you spend this mana to cast a Dragon creature spell, it enters the battlefield with an additional +1/+1 counter on it and gains hexproof until your next turn. (It can't be the target of spells or abilities your opponents control.)