Exquisite Blood The quintessential Vampire Enchantment, Exquisite Blood converts life drain into life gain, easily going infinite in conjunction with combo pieces like Sanguine Bond or Vito, Thorn of the Dusk Rose
The game does suffer from just a tad bit too much forced tutorialization in the early stages, particularly when getting to the battles, but its still hardly the worst sinner among mobile titles in this regard
1 Rite of Oblivion
This was a weakness Golgaris opponents in Guilds of Ravnica draft could exploit, since keeping an opponents creature alive could proactively invalidate Rhizome Lurcher (the big common Undergrowth payoff)

Attack!", followed by "Eternal Sunshine!" When Luna activates that monster's effect, she announces "Ancient Fairy Dragon's effect activates!" When she chooses that monster's first effect, she announces "I Special Summon a Level 4 or lower monster from my hand!" When she chooses that monster's second effect, she announces "Plain Back!" Before Luna Synchro Summons "Ancient Pixie Dragon", she announces "The spirit of the ancient fores takes solid form!", followed by "Synchro Summon!" When Luna Summons "Ancient Pixie Dragon" (by any method), a cut-in frame of Luna briefly appears, and she announces "Ancient Pixie Dragon!" Most of the time when Luna attacks with that monster, she announces "Go, Ancient Pixie Dragon!", followed by "Fairy Tail Whip!" When Luna activates that monster's Trigger Effect, she announces "Ancient Pixie Dragon's effect activates!", followed by "When a Field Spell activates on my turn, I draw a card!" When Luna activates that monster's Ignition Effect, she announces "Since there's a Field in play

3: Inflict 800 damage to your opponent, then you can destroy all monsters on the field