Engineered Explosives [Modern Masters] Magic Player Rewards 2001 and Cosi were nothing more

and Cosi were nothing more than false memories of a monstrous trinity: the Eldrazi titans Ulamog

Kalonian Hydra enters the battlefield with four +1/+1 counters on it

At the beginning of each end step

destroy all untapped creatures that didn't attack this turn

Engineered Explosives [Modern Masters] Magic Player Rewards 2001 and Cosi were nothing moreSet: Modern Masters Type: Artifact Rarity: Rare Cost: {X} Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.) {2}, Sacrifice Engineered Explosives: Destroy each nonland permanent with mana value equal to the number of charge counters on Engineered Explosives.