War of the Spark

Bolas's Citadel | Legendary Artifact | | You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life. | Jonas De Ro

Command the Dreadhorde | Sorcery | | Choose any number of target creature and/or planeswalker cards in graveyards. Command the Dreadhorde deals damage to you equal to the total mana value of those cards. Put them onto the battlefield under your control. | Daarken

Liliana, Dreadhorde General | Legendary Planeswalker | Liliana | Whenever a creature you control dies, draw a card. +1: Create a 2/2 black Zombie creature token. −4: Each player sacrifices two creatures. −9: Each opponent chooses a permanent they control of each permanent type and sacrifices the rest. | Chris Rallis

Tithebearer Giant | Creature | Giant Warrior | When Tithebearer Giant enters the battlefield, you draw a card and you lose 1 life. | Wisnu Tan

Kaya, Bane of the Dead | Legendary Planeswalker | Kaya | Your opponents and permanents your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof. −3: Exile target creature. | Magali Villeneuve

Casualties of War | Sorcery | | Choose one or more — • Destroy target artifact. • Destroy target creature. • Destroy target enchantment. • Destroy target land. • Destroy target planeswalker. | Tomasz Jedruszek