one piece card game rarity scale GUIDE What Does A Star Mean

has already come out of the gate swinging as the win condition in the popular Sapphire/Steel Item Control deck

River Song is a Time Lord, so you just need to control her

[Deck Title= Mono-Green Nissa Baker Neenan] [Creatures] 2 Walking Ballista 3 Smugglers Copter 2 Hydroid Krasis 4 Llanowar Elves 3 Tireless Tracker 4 Elvish Mystic 2 Emrakul, the Promised End 4 Burning-Tree Emissary [/Creatures] [Spells] 3 Oko, Thief of Crowns 3 Leyline of Abundance 4 Once Upon a Time 4 Nissa, Who Shakes the World [/Spells] [Lands] 3 Nykthos, Shrine to Nyx 8 Forest 3 Yavimaya Coast 4 Botanical Sanctum 4 Breeding Pool [/Lands] [Sideboard] 1 Reclamation Sage 1 Spell Pierce 2 Disdainful Stroke 2 Natural State 2 Negate 2 Scavenging Ooze 3 Veil of Summer 2 Grafdiggers Cage [/Sideboard] [/Deck] [Card]Burning-Tree Emissary[/Card] and [Card]Leyline of Abundance[/Card] plus Nykthos is a lot of mana but not necessarily a ton of consistency

Other than that pricey enchantment, I think you can safely grab a few copies of March of Wretched Sorrow, which is incredibly flexible and powerful when defending your life total