When Sharae enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Whenever you tap one or more untapped creatures your opponents control, draw a card. This ability triggers only once each turn.
Sharae turns tapping down opponents' creatures into a card-advantage engine and a soft-Stax prison. You stall the board with stun counters and mass-tap effects while drawing extra cards each turn, then grind out a win with control elements or assemble a tap-based combo or a wide finisher.
Repeatable card draw from any tap effect, refueling a controlling shell
Stun counters and tappers double as removal-light interaction, keeping creatures locked down
UW gives access to elite board wipes, counterspells, and protection
Pairs naturally with combo pieces and pillow-fort effects to dominate the board
Draw trigger only fires once per turn, capping the explosiveness
Relies on opponents having creatures to tap—stumbles against artifact/enchantment or spell-based decks
Sharae herself does little offense; can be a slow, reactive durdle deck
Vulnerable to commander hate and being raced by fast aggro before the lock comes online