Oh, that's how they get lost

Very impressive.

Fling
1R
Instant
As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature’s power to any target.

Heartfire Hero
R
Creature — Mouse Soldier

Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, put a +1/+1 counter on it.

When this creature dies, it deals damage equal to its power to each opponent.

1/1


=============

Scale Up
G
Sorcery

Until end of turn, target creature you control becomes a green Wurm with base power and toughness 6/4.

Overload 4GG (You may cast this spell for its overload cost. If you do, change “target” in its text to “each.”)

Would you love Fekkri if he was a 6/4 green wurm

I'll always love him

As long as he's not blue

But Red/Blue is the chaotic inventoriest!
Just avoid the unfun counterspells.