Fingerprint Vyke

Haste, First Strike, Invader (Whenever a creature
with Invader attacks, you choose target creature an
opponent controls to block it. It can't be blocked by
more than one creature).

Whenever Fingerprint Vyke attacks, you may
discard a card. If you do, it gets +X/+0 until end
of turn where X is the discarded card's mana cost.

Boast - {1}{r}: Draw a card.