These cards are Rusko, Oracle of the Alpha, and Tenacious Pup
Along with Captivating Vampire, Bloodline Keeper is one of those must-have cards for any Vampire-themed deck
Chandra$24.40 Chandra, Dressed to KillInnistrad: Double Feature$20.69 Chandra, the FirebrandMagic 2012$14.93 Chandra, Flame's CatalystSecret Lair Drop$6.28 Chandra, Hope's BeaconMarch of the Machine Promos$4.72 Chandra, Acolyte of FlameCore Set 2020 Promos$4.02 Chandra, Bold PyromancerDominaria$3.34 Chandra Nalaar // Chandra NalaarSecret Lair Drop$290.83 Chandra, Fire of Kaladesh // Chandra, Roaring FlameSan Diego Comic-Con 2015$84.86 Chandra's IgnitionMagic Origins$9.55 Chandra's OutrageMedia and Collaboration Promos$17.33 Chandra's DragonmechUnknown Event$45.00 Chandra's SpitfireMedia and Collaboration Promos$42.10 Chandra's IncineratorCore Set 2021 Promos$3.96 Explore Other Planeswalkers Explore MTG Cards on TCG Stacked Looking for a specific MTG card

A Special Scepter Outside of the previously mentioned near-infinite turns trick with Charmbreaker DevilsCharmbreaker Devils, the deck can also employ the occasionally seen in Legacy combo of Final FortuneFinal Fortune + Isochron ScepterIsochron Scepter
Fire Lord Azula takes that same concept of copying spells while tapped, but it limits it to your combat phase