Mega Venusaur EX requires 4x Energy to attack, but thats no pain thanks to Ivysaurs 1x Energy move, Synthesis, that brings 2 Energies to itself
Definitely going to be a staple for many decks in the future as this answers a lot of problems with just 3-man and is flexible enough to answer multiple threats
Kitt Kanto, Mayhem Diva gives you a group hug ability to have an opponents creature get +2/+2 for the turn and goads it (like if it has haste and came in after your last combat phase)
For Sheoldred, the Apocalypse Harvester of Misery: One way the black decks may try to fill two holes with one card is Harvester of Misery, who is a sizable 5 drop, but also can be discarded earlier in the game for some cheap spot removal of -2/-2
I have been informed that the specific name of this card is the Series 1 (Start of an Adventure) Theme Deck: Infernape
With little chance of survival, Magics competitors turned to digital, giving rise to the likes of Hearthstone, GWENT: The Witcher Card Game, and a hidden gem called Faeria