It has two chunks of text, and the first reads, Each Skeleton you control has trample, attacks each combat if able, and gets +X/+0, where X is the number of other Skeletons
This means that, not only can you cast Ultima on your opponents turn, but they cant even respond to it
Dark Confidant has also been a long time Plan B for combo decks, whether in the sideboard or the maindeck, such as Paulo Vitor Dama Da Rosas Dark Depths deck from Pro Tour Austin: Creatures (11) Lands (24) Spells (25) Dark Confidant is great for finding combo pieces and great when you dont assemble the combo
Or draw some more cards
*Dicebreaker does not condone staking your family members to check if theyre vampires
(2024-02-02) Any time you have priority, you may turn the face-down creature face up by revealing what its disguise cost is and paying that cost