Algernon, Mouse of Intellect (ABC-BG-006 SR) [Arcana Battle Colosseum]

[Enter] -> Put an intellect counter on this card. If you control five or more magic stones, put three intellect counters on this card instead. Remove an intellect counter from this card: This card gains [+400/+200] until end of turn. Rest, remove two intellect counters from this card: Search your deck for a chant, reveal it and put it into your hand. Then shuffle your deck.