Lich-Knights Conquest then lets you sacrifice those Rat tokens alongside any other Artifacts, Enchantments, or tokens to bring back a bunch of Creatures from your graveyard to the battlefield
If you have lands that have abilities other than tapping for mana, this is an essential tutor
Perhaps going heavier Blue would have been better, as it seems to be the only color that allows you to draw cards reliably (along with Black)
(Damage dealt by the creature also causes you to gain that much life.) Rosa, Resolute White Mage Rarity: Rare TYPE: Legendary Creature SUBTYPE: Human Noble Cleric CMC: 4 Mana cost: USD: $10.11 EUR: 5.34 TIX: 0.81 EDHREC RANK: 6482 (2/3) Reach (This creature can block creatures with flying.) At the beginning of combat on your turn, put a +1/+1 counter on target creature you control
Evereth, Viceroy of Plunder -- An artifact or creature sacrifice outlet in the command zone is powerful, especially with red and Black support