Mana Drain [Judge Gift Cards 2016] Tiefling Warlock I can prove I won

I can prove I won fair and square—I have the receipt

Set: Secret Lair Drop Series Type: Creature — Rat Rarity: Rare Cost: {1}{B} Pack Rat's power and toughness are each equal to the number of Rats you control

creatures you control have first strike and equip abilities you activate cost {1} less to activate

The Invasion Tree broke through the Blind Eternities and sent Phyrexian perfection coursing across the Multiverse

Set: Theros Beyond Death Promos Type: Enchantment Creature — Elemental Rarity: Mythic Cost: {4}{G}{G}{G} Trample

Mana Drain [Judge Gift Cards 2016] Tiefling Warlock I can prove I wonSet: Judge Gift Cards 2016 Type: Instant Rarity: Rare Cost: {U}{U} Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value. "Power is wasted on the weak. They never keep it for long." Nicol Bolas