To figure out how rare your Pokmon card is, look for the symbols in the bottom right corner of your card and if you have a lot of cards, then you should become familiar with the Pokmon card rarity indicators, as well as the different sets and booster packs in which your cards were released
To level up 1 tier you have to have 6 mores wins than Losses
It's an enduring one, too, having first been published in Japan back in 1996

Vampiric Bloodline Precon | Commander | Wizards of the Coast Commander (1) 1 Strefan, Maurer Progenitor Creatures (35) 1 Anje's Ravager 1 Anowon, the Ruin Sage 1 Blood Artist 1 Bloodline Necromancer 1 Bloodlord of Vaasgoth 1 Bloodsworn Steward 1 Bloodtithe Harvester 1 Bloodtracker 1 Butcher of Malakir 1 Champion of Dusk 1 Cordial Vampire 1 Crimson Honor Guard 1 Crossway Troublemakers 1 Dark Impostor 1 Falkenrath Gorger 1 Falkenrath Noble 1 Indulgent Aristocrat 1 Kamber, the Plunderer 1 Laurine, the Diversion 1 Malakir Bloodwitch 1 Markov Enforcer 1 Midnight Arsonist 1 Necropolis Regent 1 Nirkana Revenant 1 Patron of the Vein 1 Rakish Heir 1 Sanctum Seeker 1 Scion of Opulence 1 Shadowgrange Archfiend 1 Stromkirk Captain 1 Stromkirk Condemned 1 Stromkirk Occultist 1 Timothar, Baron of Bats 1 Vampire Nighthawk 1 Vampiric Dragon Instants (2) 1 Rakdos Charm 1 Urge to Feed Sorceries (12) 1 Ancient Craving 1 Avacyn's Judgment 1 Blasphemous Act 1 Damnable Pact 1 Feed the Swarm 1 Imposing Grandeur 1 Mob Rule 1 Night's Whisper 1 Olivia's Wrath 1 Predators' Hour 1 Sinister Waltz 1 Vandalblast Enchantments (4) 1 Arterial Alchemy 1 Molten Echoes 1 Stensia Masquerade 1 Underworld Connections Boy, we sure have come a long way from Sengir Vampire huh

This means its in a pretty volatile place in terms of long-term impact