Search your library for a legendary creature card, reveal it, put it into your hand, then shuffle.
As an additional cost to cast this spell, sacrifice a land. Search your library for a land card, put that card onto the battlefield, then shuffle.
Whenever Ruxa, Patient Professor enters or attacks, return target creature card with no abilities from your graveyard to your hand. Creatures you control with no abilities get +1/+1. For each creature you control with no abilities, you may have that creature assign its combat damage as though it weren’t blocked.
When Fractal Harness enters, create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it and attach Fractal Harness to it. Whenever equipped creature attacks, double the number of +1/+1 counters on it. Equip {2}
{X}{X}{G}: Monstrosity X. (If this creature isn’t monstrous, put X +1/+1 counters on it and it becomes monstrous.) When Polukranos, World Eater becomes monstrous, it deals X damage divided as you choose among any number of target creatures your opponents control. Each of those creatures deals damage equal to its power to Polukranos. 5/5
Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.
If Leyline of Abundance is in your opening hand, you may begin the game with it on the battlefield. Whenever you tap a creature for mana, add an additional {G}. {6}{G}{G}: Put a +1/+1 counter on each creature you control.
When Treefolk Harbinger enters, you may search your library for a Treefolk or Forest card, reveal it, then shuffle and put that card on top.
This spell can’t be countered. Hexproof (This creature can’t be the target of spells or abilities your opponents control.) {1}{G}: Regenerate Thrun, the Last Troll. 4/4
You may look at the top card of your library any time. You may play lands from the top of your library. Coven — As long as you control three or more creatures with different powers, you may cast creature spells from the top of your library. 2/3