You pay all costs and follow all timing rules for cards cast this way
For this list, I decided against duplicates, as otherwise this article would be composed of mostly different types of Charizard cards and one lone trainer card
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.) After the first ability has resolved targeting a creature, that creature has lifelink and can't be blocked for the rest of the turn, even if its power increases to 3 or greater
Then you can -2 him twice with his starting loyalty to make a 2/2 Spirit with vigilance to swing and then attack open players while keeping open blocking opportunities with the card draw trigger for growing in size
Any card from the WOTC era (1999-2003) including commons and uncommons is worth more than its modern equivalent
There are a ton of enchantments available, many of which help red to pack even more of a punch than it already does