Thousand-Year Elixir [Commander 2013] Magic Player Rewards 2001 At the beginning of combat

At the beginning of combat on your turn

but I didn't expect it from the building itself

It was Mishra's strength that first gave rise to the massive Phyrexian war engines on Dominaria

double the number of +1/+1 counters on each creature you control

Set: Onslaught Type: Enchantment Rarity: Rare Cost: {2}{R}{R} Whenever a creature enters the battlefield

Thousand-Year Elixir [Commander 2013] Magic Player Rewards 2001 At the beginning of combatSet: Commander 2013 Type: Artifact Rarity: Rare Cost: {3} You may activate abilities of creatures you control as though those creatures had haste. {1}, {T}: Untap target creature. Paradoxically, to tilt the massive jug for a sip, you'd need the energy of the giant's tonic.