Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and {T} no matter when it came under your control.) Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
When Chthonian Nightmare enters, you get {E}{E}{E} (three energy counters). Pay X {E}, Sacrifice a creature, Return Chthonian Nightmare to its owner's hand: Return target creature card with mana value X from your graveyard to the battlefield. Activate only as a sorcery.
{T}: Add {C}. {T}: Add {W} or {U}. Talisman of Progress deals 1 damage to you.
Flying Whenever a player casts their second spell each turn, Ledger Shredder connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)
{T}: Add {C}{C}.
({T}: Add {W}.)
Bojuka Bog enters tapped. When Bojuka Bog enters, exile target player's graveyard. {T}: Add {B}.