Sort Card Type Eternatus #141Rare $0.14 Eternatus #69Uncommon $0.15 Eternatus #80Rare $0.27 Eternatus V #116Ultra Rare $1.22 Eternatus V #SV121Shiny Holo Rare $6.31 Eternatus V #TG21Ultra Rare $5.64 Eternatus V #116Ultra Rare $12.00 Eternatus V - 064/100 #64Double Rare $1.04 Eternatus V - 106/100 #106Super Rare $9.84 Eternatus V - 109/184 #109Double Rare $0.40 Eternatus V - 124/190 #124Double Rare $0.43 Eternatus V - 246/184 #246Character Super Rare $3.82 Eternatus V - 327/190 #327Ultra Rare $9.38 Eternatus V - SWSH044 #SWSH44Promo $2.60 Eternatus V - SWSH064 #SWSH64Promo $1.31 Eternatus VMAX #117Ultra Rare $3.85 Eternatus VMAX #SV122Shiny Holo Rare $6.57 Eternatus VMAX #TG22Ultra Rare $12.09 Eternatus VMAX #117Ultra Rare $79.99 Eternatus VMAX - 065/100 #65Triple Rare $2.40 Eternatus VMAX - 110/184 #110Triple Rare $0.73 Eternatus VMAX - 112/100 #112Hyper Rare $20.09 Eternatus VMAX - 125/190 #125Triple Rare $0.72 Eternatus VMAX - 247/184 #247Character Super Rare $9.65 Eternatus VMAX - 328/190 #328Ultra Rare $7.70 Eternatus VMAX - SWSH045 #SWSH45Promo $5.74 Eternatus VMAX - SWSH045 #SWSH45Promo $2.35 Eternatus VMAX (Secret) #192Secret Rare $12.25 Radiant Eternatus #105Radiant Rare $38.58 Radiant Eternatus #105Radiant Rare $0.82 Radiant Eternatus #115Kagayaku $0.58 Eternatus VMAX - 112/100 #112Hyper Rare $20.09 Eternatus VMAX (Secret) #192Secret Rare $12.25 Eternatus VMAX #TG22Ultra Rare $12.09 Eternatus V - 106/100 #106Super Rare $9.84 Eternatus VMAX - 247/184 #247Character Super Rare $9.65 Eternatus V - 327/190 #327Ultra Rare $9.38 Eternatus VMAX - 328/190 #328Ultra Rare $7.70 Eternatus VMAX #SV122Shiny Holo Rare $6.57 Eternatus V #SV121Shiny Holo Rare $6.31 Eternatus VMAX - SWSH045 #SWSH45Promo $5.74

Once, while this card is in your Pendulum Zone, you can negate an activated Spell effect that would inflict damage to you, then destroy this card
Cheat out a big creature with at least 5 counters on it most likely, then make one of your monsters grow
Illustrated by Marcelo Vignali Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
This article explores pregame actions, Leylines, Chancellors, companions, conspiracies, Serum Powder mulligans, Gemstone Cavern, Flash Hulk history, and other strange cards that affect the game before anyone plays a land
Plenty of other Commander precons have used one-off adventure cards before, though the mechanic would make total sense from the Final Fantasy perspective