Whenever Alesha attacks, put a +1/+1 counter on it.
Raid — At the beginning of your end step, if you attacked this turn, return target creature card with mana value less than or equal to Alesha's power from your graveyard to the battlefield.
Attack with Alesha every turn to stack +1/+1 counters, growing her power so your end-step Raid trigger reanimates progressively bigger threats from the graveyard. Fill the yard early via discard, looting, and sacrifice, then loop value creatures and beat down while rebuilding your board for free each combat.
Free reanimation every turn with no mana cost, scaling as Alesha grows
Built-in evasion-ish resilience via first strike and a self-growing body
Reanimates creatures of any color as long as MV fits her power
Synergizes with ETB/death value creatures for repeatable advantage
Reanimation is gated by Alesha's power, so small power early limits targets
Requires attacking each turn, exposing her to combat tricks and removal
Heavily commander-dependent; loses tempo to repeated wipes or exile
No card draw or ramp in the text, can run out of gas if graveyard is empty