when you discard a card mtg Creeping Dread - Shadows over Innistrad #104 (English) Activate only as a sorcery.) Rules Text: Whenever you discard,

Pantlaza triggers a discover effect whenever he or another Dinosaur enters the battlefield but only once each turn

The reason for this is their ability, The Power of Friendship, which allows the characters underneath the shifted card to return to the field instead of staying in the discard as usual

Homelands is among the most notorious of them

Omo, Queen of Vesuva showcases an intriguing new everything counter, which doesnt do anything outside of working with Omos ability

(Whenever a creature attacks alone, it gets +1/+1 until end of turn for each instance of exalted among permanents its controller controls.) Whenever chaos ensues, put a divinity counter on target green, white, or blue creature

I'll also give some replacement options, and bonus mentions as well