Name:Invert
ManaCost:U/R
Types:Instant
AlternateMode: Split
A:SP$ Pump | Cost$ U/R | ValidTgts$ Creature | TargetMin$ 0 | TargetMax$ 2 | TgtPrompt$ Select target creature | KW$ HIDDEN CARDNAME's power and toughness are switched | SpellDescription$ Switch the power and toughness of each of up to two target creatures until end of turn.
Oracle:Switch the power and toughness of each of up to two target creatures until end of turn.

ALTERNATE

Name:Invent
ManaCost:4 U R
Types:Instant
A:SP$ ChangeZone | Cost$ 4 U R | Origin$ Library | Destination$ Hand | ChangeType$ Instant | ChangeNum$ 1 | SubAbility$ DBChange | SpellDescription$ Search your library for and instant permanent and/or a sorcery card, reveal them, put them into your hand, then shuffle.
SVar:DBChange:DB$ ChangeZone | Origin$ Library | Destination$ Hand | ChangeType$ Sorcery | ChangeNum$ 1 | Shuffle$ True
AI:RemoveDeck:Random
DeckHints:Type$Instant|Sorcery
Oracle:Search your library for an instant card and/or a sorcery card, reveal them, put them into your hand, then shuffle.