Oko has great versatility for an MTG planeswalker with three abilities - he produces 3/3 elks to block your smaller creatures, and your bigger creatures
Whatever route you take, just make sure its a beast monster youre summoning, as Obedience Schooled prevents you from summoning all non-beast monsters for the rest of the turn
Charming Prince and Ephemerate are two additional ways to accrue extra value and make each of our creatures a must-answer
Because life gain is so relatively potent you can pull back a lot of lost tempo against more agro decks and swing the tide with one card even when things look quite bleak
One synergy I particularly like in grindy match-ups is [card]Sultai Emissary[/card] and [card]Abzan Ascendancy[/card]
It's a Flock of Rabit Sheep , and they're so rabid that some of them are even pouring out of the frame of the artwork, and the one that's in the most foreground is slobbering all over the effect text and has knocked over the cracked-egg symbol