Skrier & Skiin, Manta twins

Double strike, Flying, Ward 2

When Skrier & Skiin enters, draw cards equal to
half the number of exiled cards you own, rounded down.

Whenever Skrier & Skiin deals combat damage to a player, you may cast up to 1 exiled card you own this turn.

As long as you own 20 or more exiled cards, you have no maximum hand size.