Other Cats you control get +1/+1. Whenever Arahbo or another nontoken Cat you control enters, create a 1/1 white Cat creature token.

{W}, {T}, Exert Basri: Create a 1/1 white Cat creature token with lifelink. (An exerted creature won't untap during your next untap step.) Cycling {2}{W} ({2}{W}, Discard this card: Draw a card.) When you cycle this card, Cats you control gain hexproof and indestructible until end of turn.

Lifelink Whenever one or more other creatures you control with power 2 or less enter, draw a card. This ability triggers only once each turn. When Enduring Innocence dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)

Lifelink Whenever this creature attacks while saddled, search your library for a basic Plains card, reveal it, put it into your hand, then shuffle. Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Skrelv can't block. {W/P}, {T}: Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ({W/P} can be paid with either {W} or 2 life.)

Whenever another creature you control enters, put a +1/+1 counter on this creature. As long as this creature has three or more +1/+1 counters on it, it has flying and is a Knight in addition to its other types.