Teysa of the Ghost Council

Flying At the beginning of combat on your turn, target creature you control perpetually gets +1/+0. Then choose a creature card in your hand. It perpetually gets +1/+0.

Target tapped creature perpetually loses all abilities, then Resolute Rejection deals 4 damage to it. Cycling 2

When you attack with three or more creatures, conjure a card named Mox Ruby into your hand. This ability triggers only once. 1R: Creatures you control get +1/+0 until end of turn.

Lifelink When Saint Elenda enters, conjure a card of your choice from Saint Elenda's spellbook into your hand. You may cast that card this turn without paying its mana cost. At the beginning of your end step, if you gained life this turn, create an X/X white Avatar creature token, where X is the amount of life you gained this turn.

First strike, Lifelink When Stalwart Realmwarden enters, the next noncreature spell target opponent casts costs 2 more to cast.

Whenever Emerald Collector deals combat damage to a player, draw a card. When you draw your third card in a turn, conjure a card named Mox Emerald into your hand. This ability triggers only once. 2G: Emerald Collector has base power and toughness 4/4 until end of turn.

As long as you control exactly one creature, that creature has vigilance and ward 2. Whenever a creature you control attacks alone, seek two nonland cards, then discard a card.

Flying Whenever Thieving Aven deals combat damage to a player, heist target opponent's library. Whenever you cast a spell you don't own, put a +1/+1 counter on Thieving Aven.