For example, squad and replicate let you pay extra mana to copy creatures and spells multiple times, which is just multikicker with a more specific card type requirement
SR Super Rare Different Dimension Capsule X SPELL Banish 1 card from your Deck face-down
It matters for proxies too
Deadpool, Trading Card MTG Mana Value: 2BR Rarity: Mythic Rare Type: Legendary Creature Mutant Mercenary Hero Stats: 5/3 Card Text: As Deadpool enters, you may exchange his text box and another creatures
A 4-mana 1/3 with flying is pretty awful stats, but one that makes your opponent discard something and does 2 damage to them
When a God enters the battlefield, your devotion to its color (including the mana symbols in the mana cost of the God itself) will determine if a creature entered the battlefield or not for abilities that trigger whenever a creature enters the battlefield