The first is Adventures, unique split cards that gave players a choice between casting the instant or sorcery (the Adventure) or the creature portion of the card (which could also be played after casting the Adventure)
When you goad a creature, that creature must attack each combat if able and must attack a player other than you if able
Other than gathering the information, it doesnt let you do much with it, though its a Clue that lets you draft a card from its spellbook when you sac it or another Clue
If you have to you can activate one of it's three abilities, each of which give one of your opponents a handy dandy boost
You are allowed to activate mana abilities at almost any time, so long as youre being asked to pay mana for something even in the middle of resolving another spell or ability, or during your untap step, where you normally dont get priority