Essence Manipulation

If you have two or more Dandan poison, this spell
costs {1} less to cast. If you have four or more
Dandan poison, it costs an additional {1} less to cast
for each Dandan poison beyond three that you
have. (2 or 3 Dandan hits ==> this spell costs {3}{u}.
4 hits ==> {2}{u}. 5 hits ==> {1}{u}. 6 hits ==> {u}.)

Change the text of target permanent by
replacing all instances of one basic land type with
another until end of turn. Draw a card.