Astarion, the Decadent Legendary Creature, Vampire Elf Rogue Deathtouch, lifelink: At the beginning of your end step, choose one Feed Target opponent loses life equal to the amount of life they lost this turn
(If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.) Whenever one or more +1/+1 counters are put on this creature, it gains double strike until end of turn
If the checklist card is face up in a public zone, it should be set aside and the double-faced card or meld card that it represents should be used instead
Also, please be aware of potential release date changes which shall be updated on the website
Making mana-fixing as a strength as opposed to just mana acceleration relieves green being bad at other things, and Llanowar Elves has some aesthetic baggage, at least from my perspective