Mardu Energy is an aggressive deck that can apply early pressure with Ragavan and Ocelot Pride, but Living End is naturally well-positioned here since your cyclers dwarf their creatures and the mass reanimation wipes their board. The critical danger is Goblin Bombardment — if it resolves before you combo, the opponent can sacrifice their entire board in response to Living End, draining you and leaving you with nothing to reanimate; prioritize destroying it with Force of Vigor or Foundation Breaker before cascading. Post-board, expect Thoughtseize to strip your Force of Negation or cascade spell and Nihil Spellbomb to exile your graveyard at end of turn, so cycle aggressively to maintain redundancy and hold Force of Negation specifically for graveyard hate. Dismember handles Ragavan and Sephiroth before they snowball excessive value. The lower-impact flex cyclers and Sink into Stupor come out since raw cycling density matters less than targeted interaction in this matchup.