This is a super fun creature and there are some great shenanigans to get into with reanimating lands that could further this creatures capabilities
Repeat until your opponents simply can't keep up with the constant onslaught of enormous, faceless horrors
Change Sworn Defenders toughness to 1 plus the power of that creature, until end of turn. With a Crusade in play, your Sworn Defender will be able to kill anything blocking or blocked by it and thats no small task
While Riku of Many Paths is our only direct payoff, it doesnt hurt to clone it with cards like Spark Double
Search your library for a card with the same name as that card, reveal it, put it into your hand, then shuffle your library
This is key, as Grolnok allows you to cast spells and play lands from exile with croak counters on them, meaning that through attacking, Grolnok's ability can effectively draw you three additional cards each turn