MTG Mardu Energy Deck by Yayoi11

Creatures your opponents control enter tapped. Whenever a creature an opponent controls enters, you gain 1 life.

Each player can't cast more than one noncreature spell each turn.

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

{T}, Sacrifice this artifact: Exile target player's graveyard. When this artifact is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Flash If a nontoken creature would enter and it wasn't cast, exile it instead.

You get X {E} (energy counters), then you may pay any amount of {E}. Destroy each artifact, creature, and enchantment with mana value less than or equal to the amount of {E} paid this way.

Casualty X. The copy isn't legendary and has starting loyalty X. (As you cast this spell, you may sacrifice a creature with power X. When you do, copy this spell. The copy becomes a token.) +1: Each opponent loses 2 life unless they discard a card. If you control a Demon or Devil, you gain 2 life. −2: Create a 1/1 red Devil creature token with "When this token dies, it deals 1 damage to any target." −7: Target player draws seven cards and loses 7 life.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Exile the top four cards of your library. Until the end of your next turn, you may play those cards. II, III — Whenever you cast a spell this turn, put a +1/+1 counter on target creature you control.

This spell costs {1} less to cast for each land your opponents control that could produce {C}. Flying When this creature enters, destroy target nonbasic land an opponent controls.