Virulent Plague

At the beginning of your upkeep, you gain 1 life.

When this creature enters, you may search your library for up to two creature cards with mana value 1 or less, reveal them, put them into your hand, then shuffle.

Whenever you cast an enchantment spell, create a 4/4 white Angel creature token with flying.

First strike Noncreature spells cost 1 more to cast.

Other Merfolk creatures you control get +1/+1. Whenever you cast a Merfolk spell, you may tap or untap target permanent.

Whenever you cast a spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When this creature enters, target opponent reveals their hand and you choose a nonland card from it. Exile that card until this creature leaves the battlefield.

Pack Rat's power and toughness are each equal to the number of Rats you control. 2B, Discard a card: Create a token that's a copy of this creature.