Elite's solidarity

Put five +1/+1 counters on target creature. If this spell was cast from a graveyard, put ten +1/+1 counters on that creature instead. Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When this creature enters, you may exile an instant card from your hand. , : Copy the exiled card. You may cast the copy without paying its mana cost. X is the mana value of the exiled card.

Heroic — Whenever you cast a spell that targets this creature, put a +1/+1 counter on it. Remove all +1/+1 counters from this creature: For each five counters removed this way, take an extra turn after this one.

Strive — This spell costs more to cast for each target beyond the first. Choose any number of target creatures. Double the number of +1/+1 counters on each of them.