When Invasion of Kaldheim enters the battlefield, exile all cards from your hand, then draw that many cards. Until the end of your next turn, you may play cards exiled this way.
When Invasion of Lorwyn enters the battlefield, destroy target non-Elf creature an opponent controls with power X or less, where X is the number of lands you control.
When Invasion of Muraganda enters the battlefield, put a +1/+1 counter on target creature you control. Then that creature fights up to one target creature you don't control.
When Invasion of New Capenna enters the battlefield, you may sacrifice an artifact or creature. When you do, exile target artifact or creature an opponent controls.
When Invasion of Tarkir enters the battlefield, reveal any number of Dragon cards from your hand. When you do, Invasion of Tarkir deals X plus 2 damage to any other target, where X is the number of cards revealed this way.
When Invasion of Zendikar enters the battlefield, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.
I — Return up to one target creature or planeswalker to its owner's hand. II — Return an artifact card from your graveyard to your hand. If you can't, draw a card. III — Exile this Saga, then return it to the battlefield transformed under your control.