mtg invasion of cards Magic: the Gathering - Realmbreaker, The Tree (263) choose an opponent to protect it Invasion - MTG Wiki

The goal of the deck is to play creatures and slap counters on them with cards like Maester Seymour then reward you for doing so, drawing you cards with Bred for the Hunt, giving them keywords with Sphere Grid, or protecting them with Inspiring Call, all while your creatures to continue to grow and bash in for more damage

At any time, you can pay 1 mana and remove 2 Charge Counters to get a 2/2 Spawn artifact creature token onto the battlefield

I'd put Etali, Primal Conqueror above the others because its a better card overall

From a strategic standpoint, slivers have never been the most complicated creatures in Magic, and in a lot of ways a sliver deck ends up playing itself